diff --git a/.github/workflows/msrv.yml b/.github/workflows/msrv.yml
index 0584add..ddb83cd 100644
--- a/.github/workflows/msrv.yml
+++ b/.github/workflows/msrv.yml
@@ -25,7 +25,7 @@ jobs:
         id: read_msrv
         run: |
           cargo metadata --format-version=1 \
-          | jq -r 'first(.packages[] | select(.source == null)) | .rust_version' \
+          | jq -r 'first(.packages[] | select(.source == null and .rust_version)) | .rust_version' \
           | sed -E 's/^1\.([0-9]{2})$/1\.\1\.0/' \
           | xargs -0 printf "msrv=%s" \
           | tee /dev/stderr \