Automatically install setuptools-scm in script called from Makefile

tools/ansible/build.yml

@@ -5,15 +5,16 @@
   tasks:
     - name: Get version from SCM if not explicitly provided
       shell: |
-        python3 -m setuptools_scm | cut -d + -f -1
+        make print-VERSION | cut -d + -f -1
       args:
         chdir: '../../'
-      register: setup_py_version
+      register: scm_version
+      failed_when: not scm_version.stdout
       when: awx_version is not defined
 
     - name: Set awx_version
       set_fact:
-        awx_version: "{{ setup_py_version.stdout }}"
+        awx_version: "{{ scm_version.stdout }}"
       when: awx_version is not defined
 
     - include_role:

tools/ansible/roles/dockerfile/templates/Dockerfile.j2

@@ -43,7 +43,7 @@ RUN dnf -y update && dnf install -y 'dnf-command(config-manager)' && \
     xmlsec1-devel \
     xmlsec1-openssl-devel
 
-RUN pip3 install virtualenv setuptools_scm build
+RUN pip3 install virtualenv build
 
 
 # Install & build requirements