diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 53544c0..8d01dc0 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -48,6 +48,16 @@ jobs:
             --xform='s$^$pgf-umlcd/$g' \
             -czvf pgf-umlcd_${GIT_TAG}.tar.gz $(cat FILES)
 
+    - name: 'ZIP: Check'
+      run: |
+        apt-get update -qq
+        DEBIAN_FRONTEND=noninteractive apt-get install -qq curl poppler-utils
+        curl -L -o pkgcheck "https://gitlab.com/Lotz/pkgcheck/-/raw/v2.4.0_2022-01-15/bin/pkgcheck"
+        chmod +x pkgcheck
+        PKGDIR=$(mktemp -d)
+        tar xzf "pgf-umlcd_${GIT_TAG}.tar.gz" -C "$PKGDIR"
+        ./pkgcheck -d "$PKGDIR/pgf-umlcd"
+
     - name: "ZIP: Sign"
       if: |
         matrix.engine == 'pdflatex' &&