diff --git a/.gitea/workflows/package.yml b/.gitea/workflows/package.yml
index e63f5bb..8be6ed2 100644
--- a/.gitea/workflows/package.yml
+++ b/.gitea/workflows/package.yml
@@ -145,9 +145,20 @@ jobs:
           RAW_REF: ${{ github.ref }}
           RAW_REF_NAME: ${{ github.ref_name }}
         run: |
+          if [ -z "${RAW_REGISTRY_HOST}" ]; then
+            echo "Missing required repository variable: REGISTRY_HOST"
+            exit 1
+          fi
+
           REGISTRY_HOST="${RAW_REGISTRY_HOST#http://}"
           REGISTRY_HOST="${REGISTRY_HOST#https://}"
           REGISTRY_HOST="${REGISTRY_HOST%/}"
+
+          if [ -z "${REGISTRY_HOST}" ]; then
+            echo "Repository variable REGISTRY_HOST resolves to an empty host"
+            exit 1
+          fi
+
           REPOSITORY_PATH="${RAW_REPOSITORY#/}"
           IMAGE_REPOSITORY_PATH="$(printf '%s' "$REPOSITORY_PATH" | tr '[:upper:]' '[:lower:]')"
           IMAGE_NAME="${REGISTRY_HOST}/${IMAGE_REPOSITORY_PATH}"
@@ -162,9 +173,22 @@ jobs:
           } >> "$GITHUB_ENV"
 
       - name: Login to Gitea Container Registry
+        env:
+          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
+          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
         run: |
-          echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login "$REGISTRY_HOST" \
-            --username "${{ secrets.REGISTRY_USERNAME }}" \
+          if [ -z "${REGISTRY_USERNAME}" ]; then
+            echo "Missing required repository secret: REGISTRY_USERNAME"
+            exit 1
+          fi
+
+          if [ -z "${REGISTRY_PASSWORD}" ]; then
+            echo "Missing required repository secret: REGISTRY_PASSWORD"
+            exit 1
+          fi
+
+          echo "${REGISTRY_PASSWORD}" | docker login "$REGISTRY_HOST" \
+            --username "${REGISTRY_USERNAME}" \
             --password-stdin
 
       - name: Build and Push Image