diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 9b9d0e7..ba76312 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -66,7 +66,7 @@ jobs:
         # Note the current convention is to use the -S and -B options here to specify source
         # and build directories, but this is only available with CMake 3.13 and higher.
         # The CMake binaries on the Github Actions machines are (as of this writing) 3.12
-        run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$env:BUILD_TYPE "-DJUPITER_VERSION_SHORT=Win.SHA-$(git rev-parse --short $env:GITHUB_SHA)"
+        run: cmake $env:GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$env:BUILD_TYPE "-DJUPITER_VERSION_SHORT=Win.SHA-$(git rev-parse --short $env:GITHUB_SHA)"
 
       - name: Build
         working-directory: ${{github.workspace}}/build