Merge pull request #5542 from stsewd/fix-mkdocs-call

Call mkdocs using -m

Author: stsewd

readthedocs/doc_builder/backends/mkdocs.py

@@ -246,8 +246,9 @@ def generate_rtd_data(self, docs_dir, mkdocs_config):
     def build(self):
         checkout_path = self.project.checkout_path(self.version.slug)
         build_command = [
-            'python',
-            self.python_env.venv_bin(filename='mkdocs'),
+            self.python_env.venv_bin(filename='python'),
+            '-m',
+            'mkdocs',
             self.builder,
             '--clean',
             '--site-dir',