diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6c24a0cf..8d136438 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -69,13 +69,18 @@ jobs:
               echo "Release-Branch trailer is wrong."
               exit 1
             }
+            [ -n "$RELEASE_BRANCH" ] || {
+              echo "Release-Branch trailer is empty."
+              exit 1
+            }
           fi
+
           # Fetch the branch.
           git fetch --depth 50 origin "$RELEASE_BRANCH"
 
           # Check if its reachable.
           [ -n "$(git rev-list --first-parent \
-                    --ancestry-path
+                    --ancestry-path \
                     "$RELEASE_TAG^..origin/$RELEASE_BRANCH")" ] || {
             echo "Tag is not reachable from '$RELEASE_BRANCH' (--first-parent) !" >&2
             exit 1
diff --git a/nix/pkgs/version.json b/nix/pkgs/version.json
index f339f7b9..80cc1aad 100644
--- a/nix/pkgs/version.json
+++ b/nix/pkgs/version.json
@@ -1 +1,3 @@
-{ "version": "3.0.0" }
+{
+  "version": "3.0.0-rc1"
+}
diff --git a/scripts/release.sh b/scripts/release.sh
index cddb8bac..2a44a7c1 100755
--- a/scripts/release.sh
+++ b/scripts/release.sh
@@ -34,7 +34,7 @@ function commit_version_file() {
     jq ".version |= \"$version\"" nix/pkgs/version.json >"$temp"
     mv "$temp" nix/pkgs/version.json
 
-    if git diff --quiet --exit-code; then
+    if ! git diff --quiet --exit-code; then
         git add nix/pkgs/version.json
         git commit -m "np: Update version to '$version'"
     fi