diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index d47508a..4771cd7 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -25,7 +25,7 @@ jobs:
         run: |
           app_version=$(yq '.version' rockcraft.yaml)
           version=$(yq '(.version|split("-"))[0]' rockcraft.yaml)
-          base=$(yq '(.base|split(":"))[1]' rockcraft.yaml)
+          base=$(yq '(.base|split("@"))[1]' rockcraft.yaml)
           tag=${version}-${base}_edge
           rockcraft pack
           mv charmed-mysql_${version}_amd64.rock charmed-mysql_${tag}_amd64.rock
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index bd62edc..857614c 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -42,7 +42,7 @@ jobs:
         run: |
           app=$(yq .name rockcraft.yaml)
           version=$(yq '(.version)' rockcraft.yaml)
-          base=$(yq '(.base|split(":"))[1]' rockcraft.yaml)
+          base=$(yq '(.base|split("@"))[1]' rockcraft.yaml)
           tag=${version}-${base}_edge
           sudo skopeo --insecure-policy copy \
             oci-archive:${app}_${tag}_amd64.rock \
diff --git a/.github/workflows/sbom.yaml b/.github/workflows/sbom.yaml
index 01691df..5ed05eb 100644
--- a/.github/workflows/sbom.yaml
+++ b/.github/workflows/sbom.yaml
@@ -18,7 +18,7 @@ jobs:
       - name: Set tag
         run: |
           version=$(yq '(.version|split("-"))[0]' rockcraft.yaml)
-          base=$(yq '(.base|split(":"))[1]' rockcraft.yaml)
+          base=$(yq '(.base|split("@"))[1]' rockcraft.yaml)
           echo "tag=${version}-${base}_edge" >> "$GITHUB_ENV"
       - uses: actions/download-artifact@v3
         with:
diff --git a/.github/workflows/trivy.yaml b/.github/workflows/trivy.yaml
index 4bb77be..6e27c3b 100644
--- a/.github/workflows/trivy.yaml
+++ b/.github/workflows/trivy.yaml
@@ -26,7 +26,7 @@ jobs:
         run: |
           app=$(yq .name rockcraft.yaml)
           version=$(yq '(.version)' rockcraft.yaml)
-          base=$(yq '(.base|split(":"))[1]' rockcraft.yaml)
+          base=$(yq '(.base|split("@"))[1]' rockcraft.yaml)
           tag=${version}-${base}_edge
 
           sudo skopeo --insecure-policy copy \