diff --git a/pkgs/top-level/rust-packages.nix b/pkgs/top-level/rust-packages.nix
index e22b5d3efe62..0476b3991ba0 100644
--- a/pkgs/top-level/rust-packages.nix
+++ b/pkgs/top-level/rust-packages.nix
@@ -20,7 +20,7 @@ let
 
 in
 
-runCommand "rustRegistry-${version}-${builtins.substring 0 7 rev}" {} ''
+runCommand "rustRegistry-${version}-${builtins.substring 0 7 rev}" { inherit src; } ''
   # For some reason, cargo doesn't like fetchgit's git repositories, not even
   # if we set leaveDotGit to true, set the fetchgit branch to 'master' and clone
   # the repository (tested with registry rev