diff --git a/nix/workbench/default.nix b/nix/workbench/default.nix
index b5ceb797fd8..b0c8b43b6ab 100644
--- a/nix/workbench/default.nix
+++ b/nix/workbench/default.nix
@@ -105,7 +105,7 @@ let
         or (throw "No such profile: ${profileName};  Known profiles: ${toString (__attrNames ps.value)}");
 
       profile = materialise-profile
-        { inherit profileNix workbench;
+        { inherit profileNix;
           backendProfile = backend.materialise-profile { inherit profileNix; };
         };
 
diff --git a/nix/workbench/profile.nix b/nix/workbench/profile.nix
index e49c3c73011..74374543169 100644
--- a/nix/workbench/profile.nix
+++ b/nix/workbench/profile.nix
@@ -3,7 +3,6 @@ with lib;
 
 { profileNix
 , backendProfile ## Backend-specific results for forwarding
-, workbench
 }:
 pkgs.runCommand "workbench-profile-output-${profileNix.name}"
   { buildInputs = [];