diff --git a/.github/workflows/build-image-arm64.yml b/.github/workflows/build-image-arm64.yml
index d291cf7..21b496f 100644
--- a/.github/workflows/build-image-arm64.yml
+++ b/.github/workflows/build-image-arm64.yml
@@ -22,5 +22,5 @@ jobs:
       - name: publish image
         uses: actions/upload-artifact@v2
         with:
-          name: CrawfishOS-arm64-git-${{ steps.extract_branch.outputs.branch }}-${{ github.sha }}.img.xz
-          path: CrawfishOS-arm64-git-${{ steps.extract_branch.outputs.branch }}-${{ github.sha }}.img.xz
+          name: CrawfishOS-arm64-git-${{ steps.extract_branch.outputs.branch }}-${{ github.sha }}.img.gz
+          path: CrawfishOS-arm64-git-${{ steps.extract_branch.outputs.branch }}-${{ github.sha }}.img.gz
diff --git a/.github/workflows/build-image-armhf.yml b/.github/workflows/build-image-armhf.yml
index 421826a..16da579 100644
--- a/.github/workflows/build-image-armhf.yml
+++ b/.github/workflows/build-image-armhf.yml
@@ -22,5 +22,5 @@ jobs:
       - name: publish image
         uses: actions/upload-artifact@v2
         with:
-          name: CrawfishOS-armhf-git-${{ steps.extract_branch.outputs.branch }}-${{ github.sha }}.img.xz
-          path: CrawfishOS-armhf-git-${{ steps.extract_branch.outputs.branch }}-${{ github.sha }}.img.xz
+          name: CrawfishOS-armhf-git-${{ steps.extract_branch.outputs.branch }}-${{ github.sha }}.img.gz
+          path: CrawfishOS-armhf-git-${{ steps.extract_branch.outputs.branch }}-${{ github.sha }}.img.gz
diff --git a/tests/build.sh b/tests/build.sh
index 8adf018..be0d381 100755
--- a/tests/build.sh
+++ b/tests/build.sh
@@ -53,7 +53,7 @@ make install_dependencies_yes TARGET=$TEST_TARGET
              # A) that would be an additional package to install,
              # B) github actions would then nest THAT zip inside a second zip, see https://github.com/actions/upload-artifact/issues/39
              # when ^ is fixed, revisit
-             xz -1 ${IMG}
+             gzip -1 ${IMG}
              ;;
         kernel)
              make kernel TARGET=$TEST_TARGET