diff --git a/pkgs/applications/version-management/mercurial/default.nix b/pkgs/applications/version-management/mercurial/default.nix
index 8806d8bec6d4..b01036d2292e 100644
--- a/pkgs/applications/version-management/mercurial/default.nix
+++ b/pkgs/applications/version-management/mercurial/default.nix
@@ -55,6 +55,7 @@ let
         rustPlatform.fetchCargoVendor {
           inherit src;
           name = "mercurial-${version}";
+          allowGitDependencies = false;
           hash = "sha256-k/K1BupCqnlB++2T7hJxu82yID0jG8HwLNmb2eyx29o=";
           sourceRoot = "mercurial-${version}/rust";
         }