diff --git a/pkgs/stdenv/nix/default.nix b/pkgs/stdenv/nix/default.nix
index f3fb4a4f951..6805b45e049 100644
--- a/pkgs/stdenv/nix/default.nix
+++ b/pkgs/stdenv/nix/default.nix
@@ -17,4 +17,9 @@ genericStdenv {
   };
 
   shell = pkgs.bash ~ /bin/sh;
+
+  extraAttrs = {
+    # Curl should be in /usr/bin or so.
+    curl = null;
+  };
 }