diff --git a/nix/zig-bootstrap.nix b/nix/zig-bootstrap.nix
index 129f31b..b1f88fd 100644
--- a/nix/zig-bootstrap.nix
+++ b/nix/zig-bootstrap.nix
@@ -2,6 +2,7 @@
 
 pkgs.mkShell {
   buildInputs = with pkgs; [
+    ninja
     cmake
     python3
     zlib