diff --git a/README.md b/README.md
index 689e535..699dbe6 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ include .ci/podman.mk
 
 Add subtree to your project:
 ```
-git subtree add --prefix .ci https://git.zero-downtime.net/ZeroDownTime/ci-tools-lib.git master --squash
+git subtree add --prefix .ci https://git.zero-downtime.net/ZeroDownTime/ci-tools-lib.git main --squash
 ```
 
 
diff --git a/ecr_public_lifecycle.py b/ecr_public_lifecycle.py
index 7397dc4..40bfc59 100755
--- a/ecr_public_lifecycle.py
+++ b/ecr_public_lifecycle.py
@@ -41,7 +41,8 @@ for image in sorted(images, key=lambda d: d['imagePushedAt'], reverse=True):
         _delete = True
         for tag in image["imageTags"]:
             # Look for at least one tag NOT beign a SemVer dev tag
-            if "-" not in tag:
+            # untagged dev builds get tagged as <tag>-g<commit>
+            if "-g" not in tag and "dirty" not in tag:
                 _delete = False
         if _delete:
             print("Deleting development image {}".format(image["imageTags"]))
diff --git a/podman.mk b/podman.mk
index ed5aa26..59286e2 100644
--- a/podman.mk
+++ b/podman.mk
@@ -8,8 +8,8 @@ SHELL := bash
 .PHONY: all # All targets are accessible for user
 .DEFAULT: help # Running Make will run the help target
 
-# Parse version from latest git semver tag
-GIT_TAG ?= $(shell git describe --tags --match v*.*.* 2>/dev/null || git rev-parse --short HEAD 2>/dev/null)
+# Parse version from latest git semver tag, use short commit otherwise
+GIT_TAG ?= $(shell git describe --tags --match v*.*.* --dirty 2>/dev/null || git describe --match="" --always --dirty 2>/dev/null)
 GIT_BRANCH ?= $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
 
 TAG ::= $(GIT_TAG)