diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a04b503..fed68f1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -330,7 +330,7 @@ jobs:
         run: tar -xf SDL2.zip -C ${{ runner.temp }}\SDL2 --strip-components=1
 
       - name: Set SDL2_DIR environment variable
-        run: echo SDL2_DIR=${{ runner.temp }}\SDL2\cmake >> $GITHUB_ENV
+        run: echo SDL2_DIR=${{ runner.temp }}\SDL2\cmake >> $env:GITHUB_ENV
 
       - name: Setup Python
         uses: actions/setup-python@v2.2.2