diff --git a/Fixtures/TestProject/Project.xcodeproj/project.pbxproj b/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
index 58f30bd58..6f1895592 100644
--- a/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
+++ b/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
@@ -655,8 +655,8 @@
 			buildActionMask = 2147483647;
 			files = (
 				BF1073850101 /* AppDelegate.swift in Sources */,
-				BF1744565901 /* ViewController.swift in Sources */,
 				BF1628293501 /* Standalone.swift in Sources */,
+				BF1744565901 /* ViewController.swift in Sources */,
 			);
 		};
 /* End PBXSourcesBuildPhase section */
diff --git a/Sources/XcodeGenKit/PBXProjGenerator.swift b/Sources/XcodeGenKit/PBXProjGenerator.swift
index f28f2ca48..f33eff1d0 100644
--- a/Sources/XcodeGenKit/PBXProjGenerator.swift
+++ b/Sources/XcodeGenKit/PBXProjGenerator.swift
@@ -323,7 +323,9 @@ public class PBXProjGenerator {
         var buildPhases: [String] = []
 
         func getBuildFilesForPhase(_ buildPhase: BuildPhase) -> [String] {
-            let files = sourceFiles.filter { getBuildPhaseForPath($0.path) == buildPhase }
+            let files = sourceFiles
+                .filter { getBuildPhaseForPath($0.path) == buildPhase }
+                .sorted { $0.path.lastComponent < $1.path.lastComponent }
             files.forEach { addObject($0.buildFile) }
             return files.map { $0.buildFile.reference }
         }