Fix dependency installation for github CI (again)

.github/workflows/main.yaml

@@ -12,7 +12,7 @@ jobs:
         set -x
         mkdir -p deps
         mkdir -p installed
-        PREFIX=$(pwd)/installed
+        PREFIX="$(pwd)/installed"
         git clone ${{ vars.VERSIONERS_URI }} deps/versioners
         cd deps/versioners
         PREFIX="$PREFIX" make install
@@ -21,7 +21,7 @@ jobs:
         cd deps/shunit
         PREFIX="$PREFIX" make install
         cd ../../
-        make test-ci
+        PREFIX="$PREFIX" make test-ci
         cat junit.xml
     - name: Publish Test Report
       uses: mikepenz/action-junit-report@v5