diff --git a/src/BuildPrediction/Predictors/GeneratePackageOnBuildPredictor.cs b/src/BuildPrediction/Predictors/GeneratePackageOnBuildPredictor.cs
index 1f4f043..5ffd319 100644
--- a/src/BuildPrediction/Predictors/GeneratePackageOnBuildPredictor.cs
+++ b/src/BuildPrediction/Predictors/GeneratePackageOnBuildPredictor.cs
@@ -3,98 +3,106 @@
 
 using System;
 using System.IO;
-using Microsoft.Build.Execution;
-
-namespace Microsoft.Build.Prediction.Predictors
-{
-    /// <summary>
-    /// Predicts inputs and outputs when using the built-in feature of the Sdk to create a NuGet package during the build.
-    /// </summary>
-    public sealed class GeneratePackageOnBuildPredictor : IProjectPredictor
-    {
-        internal const string GeneratePackageOnBuildPropertyName = "GeneratePackageOnBuild";
-
-        internal const string PackageIdPropertyName = "PackageId";
-
-        internal const string PackageVersionPropertyName = "PackageVersion";
-
-        internal const string PackageOutputPathPropertyName = "PackageOutputPath";
-
+using Microsoft.Build.Execution;
+
+namespace Microsoft.Build.Prediction.Predictors
+{
+    /// <summary>
+    /// Predicts inputs and outputs when using the built-in feature of the Sdk to create a NuGet package during the build.
+    /// </summary>
+    public sealed class GeneratePackageOnBuildPredictor : IProjectPredictor
+    {
+        internal const string GeneratePackageOnBuildPropertyName = "GeneratePackageOnBuild";
+
+        internal const string IsPackablePropertyName = "IsPackable";
+
+        internal const string PackageIdPropertyName = "PackageId";
+
+        internal const string PackageVersionPropertyName = "PackageVersion";
+
+        internal const string PackageOutputPathPropertyName = "PackageOutputPath";
+
         internal const string OutputPathPropertyName = "OutputPath";
 
-        internal const string OutputFileNamesWithoutVersionPropertyName = "OutputFileNamesWithoutVersion";
-
-        internal const string NuspecOutputPathPropertyName = "NuspecOutputPath";
-
-        internal const string IncludeSourcePropertyName = "IncludeSource";
-
-        internal const string IncludeSymbolsPropertyName = "IncludeSymbols";
-
-        internal const string SymbolPackageFormatPropertyName = "SymbolPackageFormat";
-
-        internal const string NuspecFilePropertyName = "NuspecFile";
-
-        /// <inheritdoc/>
-        public void PredictInputsAndOutputs(
-            ProjectInstance projectInstance,
-            ProjectPredictionReporter predictionReporter)
-        {
-            // This is based on NuGet.Build.Tasks.Pack.targets and GetPackOutputItemsTask
-            // See: https://github.com/NuGet/NuGet.Client/blob/dev/src/NuGet.Core/NuGet.Build.Tasks.Pack/NuGet.Build.Tasks.Pack.targets
-            // See: https://github.com/NuGet/NuGet.Client/blob/dev/src/NuGet.Core/NuGet.Build.Tasks.Pack/GetPackOutputItemsTask.cs
-            var generatePackageOnBuild = projectInstance.GetPropertyValue(GeneratePackageOnBuildPropertyName);
-            if (!generatePackageOnBuild.Equals("true", StringComparison.OrdinalIgnoreCase))
-            {
-                return;
-            }
-
-            var packageId = projectInstance.GetPropertyValue(PackageIdPropertyName);
-            var packageVersion = projectInstance.GetPropertyValue(PackageVersionPropertyName);
-            var packageOutputPath = projectInstance.GetPropertyValue(PackageOutputPathPropertyName);
-            var nuspecOutputPath = projectInstance.GetPropertyValue(NuspecOutputPathPropertyName);
-            var includeSource = projectInstance.GetPropertyValue(IncludeSourcePropertyName).Equals("true", StringComparison.OrdinalIgnoreCase);
+        internal const string OutputFileNamesWithoutVersionPropertyName = "OutputFileNamesWithoutVersion";
+
+        internal const string NuspecOutputPathPropertyName = "NuspecOutputPath";
+
+        internal const string IncludeSourcePropertyName = "IncludeSource";
+
+        internal const string IncludeSymbolsPropertyName = "IncludeSymbols";
+
+        internal const string SymbolPackageFormatPropertyName = "SymbolPackageFormat";
+
+        internal const string NuspecFilePropertyName = "NuspecFile";
+
+        /// <inheritdoc/>
+        public void PredictInputsAndOutputs(
+            ProjectInstance projectInstance,
+            ProjectPredictionReporter predictionReporter)
+        {
+            // This is based on NuGet.Build.Tasks.Pack.targets and GetPackOutputItemsTask
+            // See: https://github.com/NuGet/NuGet.Client/blob/dev/src/NuGet.Core/NuGet.Build.Tasks.Pack/NuGet.Build.Tasks.Pack.targets
+            // See: https://github.com/NuGet/NuGet.Client/blob/dev/src/NuGet.Core/NuGet.Build.Tasks.Pack/GetPackOutputItemsTask.cs
+            var generatePackageOnBuild = projectInstance.GetPropertyValue(GeneratePackageOnBuildPropertyName);
+            if (!generatePackageOnBuild.Equals("true", StringComparison.OrdinalIgnoreCase))
+            {
+                return;
+            }
+
+            var isPackable = projectInstance.GetPropertyValue(IsPackablePropertyName);
+            if (!isPackable.Equals("true", StringComparison.OrdinalIgnoreCase))
+            {
+                return;
+            }
+
+            var packageId = projectInstance.GetPropertyValue(PackageIdPropertyName);
+            var packageVersion = projectInstance.GetPropertyValue(PackageVersionPropertyName);
+            var packageOutputPath = projectInstance.GetPropertyValue(PackageOutputPathPropertyName);
+            var nuspecOutputPath = projectInstance.GetPropertyValue(NuspecOutputPathPropertyName);
+            var includeSource = projectInstance.GetPropertyValue(IncludeSourcePropertyName).Equals("true", StringComparison.OrdinalIgnoreCase);
             var includeSymbols = projectInstance.GetPropertyValue(IncludeSymbolsPropertyName).Equals("true", StringComparison.OrdinalIgnoreCase);
-            var outputFileNamesWithoutVersion = projectInstance.GetPropertyValue(OutputFileNamesWithoutVersionPropertyName).Equals("true", StringComparison.OrdinalIgnoreCase);
-
-            var symbolPackageFormat = projectInstance.GetPropertyValue(SymbolPackageFormatPropertyName);
-
-            // PackageOutputPath defaults to OutputPath in the _CalculateInputsOutputsForPack target, not statically.
-            if (string.IsNullOrEmpty(packageOutputPath))
-            {
-                packageOutputPath = projectInstance.GetPropertyValue(OutputPathPropertyName);
-            }
-
-            // All params are effectively required
-            if (!string.IsNullOrEmpty(packageId)
-                && !string.IsNullOrEmpty(packageVersion)
-                && !string.IsNullOrEmpty(packageOutputPath)
-                && !string.IsNullOrEmpty(nuspecOutputPath)
-                && !string.IsNullOrEmpty(symbolPackageFormat))
-            {
-                var fileBaseName = outputFileNamesWithoutVersion ? packageId : $"{packageId}.{packageVersion}";
-
-                // Nuspec files can also be provided instead of generated, in which case we should treat it like an input, not an output.
-                var nuspecFile = projectInstance.GetPropertyValue(NuspecFilePropertyName);
-
-                predictionReporter.ReportOutputFile(Path.Combine(packageOutputPath, fileBaseName + ".nupkg"));
-                if (string.IsNullOrEmpty(nuspecFile))
-                {
-                    predictionReporter.ReportOutputFile(Path.Combine(nuspecOutputPath, fileBaseName + ".nuspec"));
-                }
-                else
-                {
-                    predictionReporter.ReportInputFile(nuspecFile);
-                }
-
-                if (includeSource || includeSymbols)
-                {
-                    predictionReporter.ReportOutputFile(Path.Combine(packageOutputPath, fileBaseName + (symbolPackageFormat.Equals("snupkg", StringComparison.OrdinalIgnoreCase) ? ".snupkg" : ".symbols.nupkg")));
-                    if (string.IsNullOrEmpty(nuspecFile))
-                    {
-                        predictionReporter.ReportOutputFile(Path.Combine(nuspecOutputPath, fileBaseName + ".symbols.nuspec"));
-                    }
-                }
-            }
-        }
-    }
+            var outputFileNamesWithoutVersion = projectInstance.GetPropertyValue(OutputFileNamesWithoutVersionPropertyName).Equals("true", StringComparison.OrdinalIgnoreCase);
+
+            var symbolPackageFormat = projectInstance.GetPropertyValue(SymbolPackageFormatPropertyName);
+
+            // PackageOutputPath defaults to OutputPath in the _CalculateInputsOutputsForPack target, not statically.
+            if (string.IsNullOrEmpty(packageOutputPath))
+            {
+                packageOutputPath = projectInstance.GetPropertyValue(OutputPathPropertyName);
+            }
+
+            // All params are effectively required
+            if (!string.IsNullOrEmpty(packageId)
+                && !string.IsNullOrEmpty(packageVersion)
+                && !string.IsNullOrEmpty(packageOutputPath)
+                && !string.IsNullOrEmpty(nuspecOutputPath)
+                && !string.IsNullOrEmpty(symbolPackageFormat))
+            {
+                var fileBaseName = outputFileNamesWithoutVersion ? packageId : $"{packageId}.{packageVersion}";
+
+                // Nuspec files can also be provided instead of generated, in which case we should treat it like an input, not an output.
+                var nuspecFile = projectInstance.GetPropertyValue(NuspecFilePropertyName);
+
+                predictionReporter.ReportOutputFile(Path.Combine(packageOutputPath, fileBaseName + ".nupkg"));
+                if (string.IsNullOrEmpty(nuspecFile))
+                {
+                    predictionReporter.ReportOutputFile(Path.Combine(nuspecOutputPath, fileBaseName + ".nuspec"));
+                }
+                else
+                {
+                    predictionReporter.ReportInputFile(nuspecFile);
+                }
+
+                if (includeSource || includeSymbols)
+                {
+                    predictionReporter.ReportOutputFile(Path.Combine(packageOutputPath, fileBaseName + (symbolPackageFormat.Equals("snupkg", StringComparison.OrdinalIgnoreCase) ? ".snupkg" : ".symbols.nupkg")));
+                    if (string.IsNullOrEmpty(nuspecFile))
+                    {
+                        predictionReporter.ReportOutputFile(Path.Combine(nuspecOutputPath, fileBaseName + ".symbols.nuspec"));
+                    }
+                }
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/BuildPredictionTests/Predictors/GeneratePackageOnBuildPredictorTests.cs b/src/BuildPredictionTests/Predictors/GeneratePackageOnBuildPredictorTests.cs
index e000637..761f63d 100644
--- a/src/BuildPredictionTests/Predictors/GeneratePackageOnBuildPredictorTests.cs
+++ b/src/BuildPredictionTests/Predictors/GeneratePackageOnBuildPredictorTests.cs
@@ -4,229 +4,255 @@
 using Microsoft.Build.Construction;
 using Microsoft.Build.Execution;
 using Microsoft.Build.Prediction.Predictors;
-using Xunit;
-
-namespace Microsoft.Build.Prediction.Tests.Predictors
-{
-    public class GeneratePackageOnBuildPredictorTests
-    {
-        [Fact]
-        public void Disabled()
-        {
-            ProjectRootElement projectRootElement = ProjectRootElement.Create();
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
-            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
-
-            new GeneratePackageOnBuildPredictor()
-                .GetProjectPredictions(projectInstance)
-                .AssertNoPredictions();
-        }
-
-        [Fact]
-        public void OutputFileNamesWithoutVersion()
-        {
-            ProjectRootElement projectRootElement = ProjectRootElement.Create();
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.OutputPathPropertyName, "bin");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
+using Xunit;
+
+namespace Microsoft.Build.Prediction.Tests.Predictors
+{
+    public class GeneratePackageOnBuildPredictorTests
+    {
+        [Fact]
+        public void Disabled()
+        {
+            ProjectRootElement projectRootElement = ProjectRootElement.Create();
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IsPackablePropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
+            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
+
+            new GeneratePackageOnBuildPredictor()
+                .GetProjectPredictions(projectInstance)
+                .AssertNoPredictions();
+        }
+
+        [Fact]
+        public void NotPackable()
+        {
+            ProjectRootElement projectRootElement = ProjectRootElement.Create();
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IsPackablePropertyName, "false");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.OutputPathPropertyName, "bin");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
+            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
+
+            new GeneratePackageOnBuildPredictor()
+                .GetProjectPredictions(projectInstance)
+                .AssertNoPredictions();
+        }
+
+        [Fact]
+        public void OutputFileNamesWithoutVersion()
+        {
+            ProjectRootElement projectRootElement = ProjectRootElement.Create();
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IsPackablePropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.OutputPathPropertyName, "bin");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.OutputFileNamesWithoutVersionPropertyName, "true");
+            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
+
+            var expectedOutputFiles = new[]
+            {
+                new PredictedItem(@"obj\SomePackage.nuspec", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"bin\SomePackage.nupkg", nameof(GeneratePackageOnBuildPredictor)),
+            };
+            new GeneratePackageOnBuildPredictor()
+                .GetProjectPredictions(projectInstance)
+                .AssertPredictions(
+                    projectInstance,
+                    null,
+                    null,
+                    expectedOutputFiles,
+                    null);
+        }
+
+        [Fact]
+        public void GeneratedNuspecDefaultNuspecOutputPath()
+        {
+            ProjectRootElement projectRootElement = ProjectRootElement.Create();
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IsPackablePropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.OutputPathPropertyName, "bin");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
+            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
+
+            var expectedOutputFiles = new[]
+            {
+                new PredictedItem(@"obj\SomePackage.1.2.3.nuspec", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
+            };
+            new GeneratePackageOnBuildPredictor()
+                .GetProjectPredictions(projectInstance)
+                .AssertPredictions(
+                    projectInstance,
+                    null,
+                    null,
+                    expectedOutputFiles,
+                    null);
+        }
+
+        [Fact]
+        public void GeneratedNuspecCustomNuspecOutputPath()
+        {
+            ProjectRootElement projectRootElement = ProjectRootElement.Create();
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IsPackablePropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
             projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.OutputFileNamesWithoutVersionPropertyName, "true");
-            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
-
-            var expectedOutputFiles = new[]
-            {
-                new PredictedItem(@"obj\SomePackage.nuspec", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"bin\SomePackage.nupkg", nameof(GeneratePackageOnBuildPredictor)),
-            };
-            new GeneratePackageOnBuildPredictor()
-                .GetProjectPredictions(projectInstance)
-                .AssertPredictions(
-                    projectInstance,
-                    null,
-                    null,
-                    expectedOutputFiles,
-                    null);
-        }
-
-        [Fact]
-        public void GeneratedNuspecDefaultNuspecOutputPath()
-        {
-            ProjectRootElement projectRootElement = ProjectRootElement.Create();
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.OutputPathPropertyName, "bin");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
-            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
-
-            var expectedOutputFiles = new[]
-            {
-                new PredictedItem(@"obj\SomePackage.1.2.3.nuspec", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
-            };
-            new GeneratePackageOnBuildPredictor()
-                .GetProjectPredictions(projectInstance)
-                .AssertPredictions(
-                    projectInstance,
-                    null,
-                    null,
-                    expectedOutputFiles,
-                    null);
-        }
-
-        [Fact]
-        public void GeneratedNuspecCustomNuspecOutputPath()
-        {
-            ProjectRootElement projectRootElement = ProjectRootElement.Create();
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
-            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
-
-            var expectedOutputFiles = new[]
-            {
-                new PredictedItem(@"obj\SomePackage.1.2.3.nuspec", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
-            };
-            new GeneratePackageOnBuildPredictor()
-                .GetProjectPredictions(projectInstance)
-                .AssertPredictions(
-                    projectInstance,
-                    null,
-                    null,
-                    expectedOutputFiles,
-                    null);
-        }
-
-        [Fact]
-        public void ProvidedNuspec()
-        {
-            ProjectRootElement projectRootElement = ProjectRootElement.Create();
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecFilePropertyName, "SomePackage.nuspec");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
-            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
-
-            var expectedInputFiles = new[]
-            {
-                new PredictedItem(@"SomePackage.nuspec", nameof(GeneratePackageOnBuildPredictor)),
-            };
-            var expectedOutputFiles = new[]
-            {
-                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
-            };
-            new GeneratePackageOnBuildPredictor()
-                .GetProjectPredictions(projectInstance)
-                .AssertPredictions(
-                    projectInstance,
-                    expectedInputFiles,
-                    null,
-                    expectedOutputFiles,
-                    null);
-        }
-
-        [Fact]
-        public void IncludeSource()
-        {
-            ProjectRootElement projectRootElement = ProjectRootElement.Create();
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IncludeSourcePropertyName, "true");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
-            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
-
-            var expectedOutputFiles = new[]
-            {
-                new PredictedItem(@"obj\SomePackage.1.2.3.nuspec", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"obj\SomePackage.1.2.3.symbols.nuspec", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"bin\SomePackage.1.2.3.symbols.nupkg", nameof(GeneratePackageOnBuildPredictor)),
-            };
-            new GeneratePackageOnBuildPredictor()
-                .GetProjectPredictions(projectInstance)
-                .AssertPredictions(
-                    projectInstance,
-                    null,
-                    null,
-                    expectedOutputFiles,
-                    null);
-        }
-
-        [Fact]
-        public void IncludeSymbols()
-        {
-            ProjectRootElement projectRootElement = ProjectRootElement.Create();
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IncludeSymbolsPropertyName, "true");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
-            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
-
-            var expectedOutputFiles = new[]
-            {
-                new PredictedItem(@"obj\SomePackage.1.2.3.nuspec", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"obj\SomePackage.1.2.3.symbols.nuspec", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"bin\SomePackage.1.2.3.symbols.nupkg", nameof(GeneratePackageOnBuildPredictor)),
-            };
-            new GeneratePackageOnBuildPredictor()
-                .GetProjectPredictions(projectInstance)
-                .AssertPredictions(
-                    projectInstance,
-                    null,
-                    null,
-                    expectedOutputFiles,
-                    null);
-        }
-
-        [Fact]
-        public void Snupkg()
-        {
-            ProjectRootElement projectRootElement = ProjectRootElement.Create();
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IncludeSymbolsPropertyName, "true");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
-            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "snupkg");
-            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
-
-            var expectedOutputFiles = new[]
-            {
-                new PredictedItem(@"obj\SomePackage.1.2.3.nuspec", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"obj\SomePackage.1.2.3.symbols.nuspec", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
-                new PredictedItem(@"bin\SomePackage.1.2.3.snupkg", nameof(GeneratePackageOnBuildPredictor)),
-            };
-            new GeneratePackageOnBuildPredictor()
-                .GetProjectPredictions(projectInstance)
-                .AssertPredictions(
-                    projectInstance,
-                    null,
-                    null,
-                    expectedOutputFiles,
-                    null);
-        }
-    }
+            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
+
+            var expectedOutputFiles = new[]
+            {
+                new PredictedItem(@"obj\SomePackage.1.2.3.nuspec", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
+            };
+            new GeneratePackageOnBuildPredictor()
+                .GetProjectPredictions(projectInstance)
+                .AssertPredictions(
+                    projectInstance,
+                    null,
+                    null,
+                    expectedOutputFiles,
+                    null);
+        }
+
+        [Fact]
+        public void ProvidedNuspec()
+        {
+            ProjectRootElement projectRootElement = ProjectRootElement.Create();
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IsPackablePropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecFilePropertyName, "SomePackage.nuspec");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
+            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
+
+            var expectedInputFiles = new[]
+            {
+                new PredictedItem(@"SomePackage.nuspec", nameof(GeneratePackageOnBuildPredictor)),
+            };
+            var expectedOutputFiles = new[]
+            {
+                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
+            };
+            new GeneratePackageOnBuildPredictor()
+                .GetProjectPredictions(projectInstance)
+                .AssertPredictions(
+                    projectInstance,
+                    expectedInputFiles,
+                    null,
+                    expectedOutputFiles,
+                    null);
+        }
+
+        [Fact]
+        public void IncludeSource()
+        {
+            ProjectRootElement projectRootElement = ProjectRootElement.Create();
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IsPackablePropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IncludeSourcePropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
+            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
+
+            var expectedOutputFiles = new[]
+            {
+                new PredictedItem(@"obj\SomePackage.1.2.3.nuspec", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"obj\SomePackage.1.2.3.symbols.nuspec", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"bin\SomePackage.1.2.3.symbols.nupkg", nameof(GeneratePackageOnBuildPredictor)),
+            };
+            new GeneratePackageOnBuildPredictor()
+                .GetProjectPredictions(projectInstance)
+                .AssertPredictions(
+                    projectInstance,
+                    null,
+                    null,
+                    expectedOutputFiles,
+                    null);
+        }
+
+        [Fact]
+        public void IncludeSymbols()
+        {
+            ProjectRootElement projectRootElement = ProjectRootElement.Create();
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IsPackablePropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IncludeSymbolsPropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "symbols.nupkg");
+            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
+
+            var expectedOutputFiles = new[]
+            {
+                new PredictedItem(@"obj\SomePackage.1.2.3.nuspec", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"obj\SomePackage.1.2.3.symbols.nuspec", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"bin\SomePackage.1.2.3.symbols.nupkg", nameof(GeneratePackageOnBuildPredictor)),
+            };
+            new GeneratePackageOnBuildPredictor()
+                .GetProjectPredictions(projectInstance)
+                .AssertPredictions(
+                    projectInstance,
+                    null,
+                    null,
+                    expectedOutputFiles,
+                    null);
+        }
+
+        [Fact]
+        public void Snupkg()
+        {
+            ProjectRootElement projectRootElement = ProjectRootElement.Create();
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.GeneratePackageOnBuildPropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IsPackablePropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.IncludeSymbolsPropertyName, "true");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageIdPropertyName, "SomePackage");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageVersionPropertyName, "1.2.3");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.PackageOutputPathPropertyName, "bin");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.NuspecOutputPathPropertyName, "obj");
+            projectRootElement.AddProperty(GeneratePackageOnBuildPredictor.SymbolPackageFormatPropertyName, "snupkg");
+            ProjectInstance projectInstance = TestHelpers.CreateProjectInstanceFromRootElement(projectRootElement);
+
+            var expectedOutputFiles = new[]
+            {
+                new PredictedItem(@"obj\SomePackage.1.2.3.nuspec", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"obj\SomePackage.1.2.3.symbols.nuspec", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"bin\SomePackage.1.2.3.nupkg", nameof(GeneratePackageOnBuildPredictor)),
+                new PredictedItem(@"bin\SomePackage.1.2.3.snupkg", nameof(GeneratePackageOnBuildPredictor)),
+            };
+            new GeneratePackageOnBuildPredictor()
+                .GetProjectPredictions(projectInstance)
+                .AssertPredictions(
+                    projectInstance,
+                    null,
+                    null,
+                    expectedOutputFiles,
+                    null);
+        }
+    }
 }
\ No newline at end of file