invert condition for setup script

Author: kambala-decapitator

.github/workflows/rebuildDependencies.yml

@@ -74,7 +74,7 @@ jobs:
       run: |
         echo CUSTOM_PATCHES_PATH="$(pwd)/conan_patches" >> $GITHUB_ENV
         echo DEPS_FILE="dependencies-${{ matrix.platform }}.tgz" >> $GITHUB_ENV
-        [ '${{ matrix.before_install }}' ] && 'ci/${{ matrix.before_install }}'
+        [ -z '${{ matrix.before_install }}' ] || 'ci/${{ matrix.before_install }}'
 
     - uses: actions/setup-java@v4
       if: ${{ startsWith(matrix.platform, 'android') }}