diff --git a/.github/workflows/scip-index.yml b/.github/workflows/scip-index.yml
index 4fbaa1c..5c27674 100644
--- a/.github/workflows/scip-index.yml
+++ b/.github/workflows/scip-index.yml
@@ -40,7 +40,7 @@ jobs:
       - name: Generate SCIP index
         run: |
           cd /tmp/scip-clojure
-          clojure -M:run -p $GITHUB_WORKSPACE -o $GITHUB_WORKSPACE/index.scip
+          clojure -M:run -p $GITHUB_WORKSPACE -o $GITHUB_WORKSPACE/index.scip -m $GITHUB_WORKSPACE/package-map.edn
         env:
           CLOJURE_LSP_PATH: /usr/local/bin/clojure-lsp
 
diff --git a/package-map.edn b/package-map.edn
new file mode 100644
index 0000000..97875fa
--- /dev/null
+++ b/package-map.edn
@@ -0,0 +1,7 @@
+;; Package map for cross-repository SCIP navigation
+;; Maps namespace prefixes to package@version coordinates
+;;
+;; This enables Sourcegraph to resolve cross-repo references:
+;; - "tui" prefix -> this repository
+
+{"tui" "io.github.ajet/clojure-tui@main"}