pip3 ofcourse

.gitlab-ci.yml

@@ -4,7 +4,7 @@ build:
     stage: build
     before_script:
         - apt update -qq && apt install -y -qq gcc-arm-none-eabi python3-pip git
-        - pip install crc16
+        - pip3 install crc16
     script:
         - cd bootloader
         - make