FIX: build tooling

.gitlab-ci.yml

@@ -16,7 +16,7 @@ cache:
 
 before_script:
   - python -V  # Print out python version for debugging
-  - pip install pep517
+  - pip install build
 
 stages:
   - build
@@ -24,7 +24,7 @@ stages:
 build:
   stage: build
   script:
-    - python -m pep517.build .
+    - python -m build
   artifacts:
     paths:
       - dist/*