diff --git a/.gitlab/ci/build.gitlab-ci.yml b/.gitlab/ci/build.gitlab-ci.yml
index 902580c95b088100a64626bfbe7f13bea7867813..06329dd63e88b89bd2d76dc334ed30afbf35ea27 100644
--- a/.gitlab/ci/build.gitlab-ci.yml
+++ b/.gitlab/ci/build.gitlab-ci.yml
@@ -11,9 +11,10 @@ build:ubuntu_cpp:
     - rm -rf build_cpp
 
     # Build current module
+    - export CMAKE_PREFIX_PATH=../install_cpp
     - mkdir -p build_cpp
     - cd build_cpp
-    - cmake -DCMAKE_INSTALL_PREFIX:PATH=$INSTALL_PATH -DCMAKE_BUILD_TYPE=Debug -DWERROR=ON ..
+    - cmake -DCMAKE_INSTALL_PREFIX:PATH=../install_cpp -DCMAKE_BUILD_TYPE=Debug -DWERROR=ON ..
     - make -j4 all install
 
   artifacts:
@@ -40,6 +41,7 @@ build:ubuntu_python:
     - virtualenv venv
     - source venv/bin/activate
     - export AIDGE_INSTALL=`pwd`/install
+    - export CMAKE_PREFIX_PATH=../install_cpp
     - python3 -m pip install .
   artifacts:
     paths: