diff --git a/templates/bookworm.yml b/templates/bookworm.yml
index 58367935853b9a2a86065522ac013e899c1cc56e..ecf0d21cd8d3e4fbd754bf667b6cbfd0ea707585 100644
--- a/templates/bookworm.yml
+++ b/templates/bookworm.yml
@@ -45,13 +45,13 @@ spec:
     - ccache -z
     - >
       cmake
-      -B "${Env:BUILD_DIR}"
+      -B "${BUILD_DIR}"
       -S "$[[ inputs.src_folder ]]"
-      -DCMAKE_BUILD_TYPE="${Env:BUILD_TYPE}"
+      -DCMAKE_BUILD_TYPE="${BUILD_TYPE}"
       -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
       $[[ inputs.cmake_options ]]
     - ccache -s -v
-    - ctest --test-dir "${Env:BUILD_DIR}" --output-junit "${Env:BUILD_DIR}/test-report-${Env:BUILD_TYPE}.xml"
+    - ctest --test-dir "${BUILD_DIR}" --output-junit "${BUILD_DIR}/test-report-${BUILD_TYPE}.xml"
 
   artifacts:
     when: always