diff --git a/shell.nix b/shell.nix
index be2dcb2f885f88ca8be382d44724699516c4b587..f32999356c353665a523a1e453b34335b2cc972e 100644
--- a/shell.nix
+++ b/shell.nix
@@ -52,5 +52,6 @@ else
           "assets/fonts/zed-sans"
         ];
       };
+      PROTOC = "${pkgs.protobuf}/bin/protoc";
     };
   }