diff --git a/pkgs/servers/matrix-synapse/matrix-hookshot/default.nix b/pkgs/servers/matrix-synapse/matrix-hookshot/default.nix
index f784036075c8..f8bdd9d6e9b8 100644
--- a/pkgs/servers/matrix-synapse/matrix-hookshot/default.nix
+++ b/pkgs/servers/matrix-synapse/matrix-hookshot/default.nix
@@ -72,6 +72,11 @@ mkYarnPackage rec {
         "$out/libexec/matrix-hookshot/deps/matrix-hookshot/lib/App/BridgeApp.js"
   '';
 
+  postFixup = ''
+    # Scrub reference to rustc
+    rm $out/libexec/matrix-hookshot/deps/matrix-hookshot/target/.rustc_info.json
+  '';
+
   doDist = false;
 
   meta = with lib; {