diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 80cb234..4948e33 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -33,13 +33,32 @@ jobs:
       - name: Extract base version
         id: extract
         run: |
-          # Extract base (non-prerelease) version like 1.1.4 from src/modules.d.ts
-          # Use a strict regex to capture exactly three numeric components (major.minor.patch)
-          version=$(sed -nE 's/.*"([0-9]+\.[0-9]+\.[0-9]+)".*/\1/p' src/modules.d.ts | head -n1)
-          if [ -z "$version" ]; then
-            echo "Failed to extract version" >&2
+          # Extract base version (major.minor.patch) from src/modules.d.ts using pure shell (grep/sed)
+          # Capture the first three-part version and ignore any prerelease suffix (e.g. "-1")
+          if [ ! -f src/modules.d.ts ]; then
+            echo "src/modules.d.ts not found" >&2
             exit 1
           fi
+          # Print the file for debugging in workflow logs
+          echo '--- src/modules.d.ts ---' >&2
+          sed -n '1,200p' src/modules.d.ts >&2 || true
+
+          # Primary extraction: match "X.Y.Z" (three numeric components) within quotes
+          version=$(grep -m1 -oE '"[0-9]+\.[0-9]+\.[0-9]+' src/modules.d.ts | tr -d '"' | head -n1 || true)
+
+          # Fallback: capture quoted version possibly with prerelease suffix and strip suffix
+          if [ -z "$version" ]; then
+            raw=$(grep -m1 -oE '"[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z.-]+)?"' src/modules.d.ts | tr -d '"' | head -n1 || true)
+            version=$(printf '%s' "$raw" | sed -E 's/^([0-9]+\.[0-9]+\.[0-9]+).*/\1/')
+          fi
+
+          # Validate final result is exactly major.minor.patch
+          if ! printf '%s' "$version" | grep -xE '^[0-9]+\.[0-9]+\.[0-9]+$' >/dev/null; then
+            echo "Failed to extract a valid base version from src/modules.d.ts" >&2
+            sed -n '1,200p' src/modules.d.ts >&2 || true
+            exit 1
+          fi
+
           echo "version=$version" >> $GITHUB_OUTPUT
         shell: bash