diff --git a/.github/workflows/Build.yml b/.github/workflows/Build.yml
index 06fd474593..d1ed2fc30a 100644
--- a/.github/workflows/Build.yml
+++ b/.github/workflows/Build.yml
@@ -120,12 +120,11 @@ jobs:
 
     - name: Install deb package
       run: docker exec kphp-build-container-${{matrix.os}} bash -c
-            "cd ${{env.kphp_build_dir}} && dpkg -i vk-flex-data_1.0.1_amd64.deb && dpkg -i kphp_1.0.1_amd64.deb"
+            "cd ${{env.kphp_build_dir}} && apt install ./vk-flex-data_1.0.1_amd64.deb && apt install ./kphp_1.0.1_amd64.deb"
 
     - name: Compile dummy script
       run: docker exec kphp-build-container-${{matrix.os}} bash -c
-            "cd ${{env.demo_dir}} && echo 'hello world' > demo.php && kphp --mode=cli --cxx=g++ demo.php && ./kphp_out/cli -o --user kitten"
-
+             "cd ${{env.kphp_build_dir}} && echo 'hello world' > demo.php && su kitten -c kphp --mode=cli --cxx=g++ demo.php && ./kphp_out/cli -o --user kitten"
     - name: Remove docker container
       run: docker rm -f kphp-build-container-${{matrix.os}}