diff --git a/pkgs/build-support/rust/import-cargo-lock.nix b/pkgs/build-support/rust/import-cargo-lock.nix
index 1c739933af16..d8ae8a5be94d 100644
--- a/pkgs/build-support/rust/import-cargo-lock.nix
+++ b/pkgs/build-support/rust/import-cargo-lock.nix
@@ -138,6 +138,7 @@ let
               inherit (gitParts) url;
               rev = gitParts.sha;
               allRefs = true;
+              submodules = true;
             }
           else
             missingHash;