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-rw-r--r--pkgs/build-support/rust/fetchCargoTarball.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/build-support/rust/fetchCargoTarball.nix b/pkgs/build-support/rust/fetchCargoTarball.nix
index c30e88d99b8..3b36554e707 100644
--- a/pkgs/build-support/rust/fetchCargoTarball.nix
+++ b/pkgs/build-support/rust/fetchCargoTarball.nix
@@ -21,7 +21,7 @@ in
 , src ? null
 , srcs ? []
 , patches ? []
-, sourceRoot
+, sourceRoot ? ""
 , hash ? ""
 , sha256 ? ""
 , cargoUpdateHook ? ""