diff --git a/.github/workflows/msvc.yml b/.github/workflows/msvc.yml
index 1fdd8f8..e0913e6 100644
--- a/.github/workflows/msvc.yml
+++ b/.github/workflows/msvc.yml
@@ -15,7 +15,7 @@ jobs:
           mkdir build
           cmake -S . -B build `
             -G "Visual Studio 17 2022" -T v143 `
-            -DVCTOOLS_INSTALL_DIR=%VCTOOLS_INSTALL_DIR%
+            -DVCTOOLS_INSTALL_DIR="$env:VCToolsInstallDir"
 
       - name: Build
         run: |