Build with GNU Makefile

.gitlab-ci.yml

@@ -75,6 +75,12 @@ spack:no_cgal:
 
 .test:gnumake: &gnumake_def
   stage: test
+  variables:
+    BUILD: ${CI_PROJECT_DIR}/build
+    BOOST_HOME: ${BUILD}/boost
+    CATCH2_HOME: ${BUILD}/catch2
+    CGAL_HOME: ${BUILD}/cgal
+    PEGTL_HOME: ${BUILD}/taocpp-pegtl
   image: $CI_REGISTRY_IMAGE:latest
   needs: ['build-img']
   script:
@@ -84,7 +90,7 @@ spack:no_cgal:
         conan install -if build -g deploy cgal/5.2.1@
       fi
     - conan install -if build -g deploy taocpp-pegtl/3.2.1@
-    - make install BOOST_HOME=build/boost CATCH2_HOME=build/catch2 CGAL_HOME=build/cgal PEGTL_HOME=build/taocpp-pegtl DESTDIR=install_destination
+    - make install DESTDIR=the_destination
   tags:
     - docker