diff --git a/src/buildtools/buildtools.targets b/src/buildtools/buildtools.targets
index 303ab00825d..5c44c12cd40 100644
--- a/src/buildtools/buildtools.targets
+++ b/src/buildtools/buildtools.targets
@@ -20,7 +20,7 @@
           BeforeTargets="CoreCompile">
 
     <PropertyGroup>
-        <FsLexPath Condition="'$(FsLexPath)' == ''">$(ArtifactsDir)\Bootstrap\fslex.dll</FsLexPath>
+        <FsLexPath Condition="'$(FsLexPath)' == ''">$(ArtifactsDir)\bin\fslex\Proto\netcoreapp2.1\fslex.dll</FsLexPath>
     </PropertyGroup>
 
     <!-- Create the output directory -->
@@ -43,7 +43,7 @@
           BeforeTargets="CoreCompile">
 
     <PropertyGroup>
-        <FsYaccPath Condition="'$(FsYaccPath)' == ''">$(ArtifactsDir)\Bootstrap\fsyacc.dll</FsYaccPath>
+        <FsYaccPath Condition="'$(FsYaccPath)' == ''">$(ArtifactsDir)\bin\fsyacc\Proto\netcoreapp2.1\fsyacc.dll</FsYaccPath>
     </PropertyGroup>
 
     <!-- Create the output directory -->