diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index e33ff2e1..c37a0fed 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -20,6 +20,8 @@ jobs:
       uses: actions/setup-java@v1
       with:
         java-version: 1.8
+    - name: Clean
+      run: yes | rm -rf ./arclight-coremod/build/libs
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build with Gradle
diff --git a/appveyor.yml b/appveyor.yml
index 8d4032cb..4a078167 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -6,7 +6,7 @@ cache:
   - ./.gradle
 build_script:
   - cmd: |
-      gradlew clean genIntellijRuns idea --no-daemon -i
+      del /S /Q arclight-coremod\build\libs
       gradlew build --no-daemon -i
 test: off
 artifacts: