diff --git a/acm.py b/acm.py
index 7275a73..54131ed 100755
--- a/acm.py
+++ b/acm.py
@@ -46,9 +46,8 @@ async def run_command_shell(
     process_stdout, process_stderr = await process.communicate()
 
     if process.returncode == 0:
-        for callable in on_success:
-            if callable is not None:
-                callable()
+        for success_callable in on_success:
+            success_callable()
 
     if stdout != asyncio.subprocess.DEVNULL:
         result = process_stdout.decode().strip()
@@ -725,7 +724,7 @@ def compress_assets(ctx, profile, content, destination, print_input_and_identity
                         )
                     )
             return task
-        return None
+        return lambda: True
 
     for input_file in files:
         for content_configuration in content_configurations:
diff --git a/pipeline.yml b/pipeline.yml
index 9aa8098..30bd44b 100644
--- a/pipeline.yml
+++ b/pipeline.yml
@@ -28,7 +28,8 @@ jobs:
           - put: git-resource-image-nexus
             params:
               build: git-resource
-              cache: sothr/acm:latest
+              cache: true
+              cache_tag: latest
               tag_file: git-resource/.git/ref
               tag_as_latest: true
             get_params:
@@ -36,7 +37,8 @@ jobs:
           - put: git-resource-image
             params:
               build: git-resource
-              cache: sothr/acm:latest
+              cache: true
+              cache_tag: latest
               tag_file: git-resource/.git/ref
               tag_as_latest: true
             get_params: