Fix build issue

.gitlab-ci.yml

 
 variables:
-  CONAN_VERSION: "2.36.2"
+  CONAN_VERSION: "1.52.0"
   PYTHON_VERSION: "3.6.13"
 
 stages:
@@ -14,11 +14,11 @@ stages:
     # Install python 3
     - curl -s -L -o ${PYTHON_ROOT}.zip https://gitlab.synchrotron-soleil.fr/software-control-system/devtools/python3/-/jobs/artifacts/main/download?job=${PLATFORM}
     - unzip -q ${PYTHON_ROOT}.zip -d ${CI_PROJECT_DIR}
-    - rm ${PYTHON_ROOT}.zip
+    - rm -f ${PYTHON_ROOT}.zip
     # Install conan
-    - ${PYTHON_ROOT}/bin/pip3 install -q --no-cache-dir --prefix=${CONAN_ROOT} conan==${CONAN_VERSION} conan-package-tools
+    - ${CI_PROJECT_DIR}/${PYTHON_ROOT}/bin/python -m pip install -q --no-cache-dir --prefix=${CI_PROJECT_DIR}/${CONAN_ROOT} conan==${CONAN_VERSION} conan-package-tools
     # Fix python shebang to make it independent of install path
-    - grep -I -r -l  "^#\!${PYTHON_ROOT}/bin/python.*$" ${CONAN_ROOT} | xargs sed -i '1c\#\!/usr/bin/env python'
+    - grep -I -r -l  "^#\!${CI_PROJECT_DIR}/${PYTHON_ROOT}/bin/python.*$" ${CI_PROJECT_DIR}/${CONAN_ROOT} | xargs sed -i '1c\#\!/usr/bin/env python'
     # Clean pycache
     - find ${CI_PROJECT_DIR}/${CONAN_ROOT} -iname __pycache__ -print0 | xargs -0 rm -rf
   artifacts: