diff --git a/.github/actions/build-supercollider-windows/action.yaml b/.github/actions/build-supercollider-windows/action.yaml
index 8b1f16a4e..03ff80549 100644
--- a/.github/actions/build-supercollider-windows/action.yaml
+++ b/.github/actions/build-supercollider-windows/action.yaml
@@ -47,7 +47,7 @@ runs:
     - name: Install ccache
       run: |
         choco install ccache --no-progress
-        echo "`echo c:/ProgramData/chocolatey/lib/ccache/tools/ccache*`" >> $GITHUB_PATH
+        echo "`echo C:/ProgramData/chocolatey/lib/ccache/tools/ccache*`" >> $GITHUB_PATH
       shell: bash
 
     - name: Install libsndfile
@@ -104,5 +104,7 @@ runs:
       shell: bash
 
     - name: Install
-      run: mv "/tmp/supercollider/build/Install/SuperCollider" "C:/Program Files/SuperCollider"
+      run: |
+        mv "/tmp/supercollider/build/Install/SuperCollider" "C:/Program Files/SuperCollider"
+        mkdir -p "C:/Users/runneradmin/AppData/Local/SuperCollider/synthdefs"
       shell: bash