diff --git a/pkgs/development/tools/build-managers/bazel/default.nix b/pkgs/development/tools/build-managers/bazel/default.nix
index 75ab82a0ac62..32d35f1421c8 100644
--- a/pkgs/development/tools/build-managers/bazel/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/default.nix
@@ -245,6 +245,7 @@ stdenv.mkDerivation rec {
     scripts/generate_bash_completion.sh \
         --bazel=./output/bazel \
         --output=output/bazel-complete.bash \
+        --prepend=scripts/bazel-complete-header.bash \
         --prepend=scripts/bazel-complete-template.bash
   '';