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-rw-r--r--pkgs/build-support/rust/build-rust-crate/default.nix4
1 files changed, 2 insertions, 2 deletions
diff --git a/pkgs/build-support/rust/build-rust-crate/default.nix b/pkgs/build-support/rust/build-rust-crate/default.nix
index ee96c873f54b..f6079b7316d6 100644
--- a/pkgs/build-support/rust/build-rust-crate/default.nix
+++ b/pkgs/build-support/rust/build-rust-crate/default.nix
@@ -300,7 +300,7 @@ crate_: lib.makeOverridable
           (crate.features ++ features)
         );
 
-      libName = crate.libName or crate.crateName;
+      libName = if crate ? libName then crate.libName else crate.crateName;
       libPath = lib.optionalString (crate ? libPath) crate.libPath;
 
       # Seed the symbol hashes with something unique every time.
@@ -329,7 +329,7 @@ crate_: lib.makeOverridable
       colors = lib.attrByPath [ "colors" ] "always" crate;
       extraLinkFlags = lib.concatStringsSep " " (crate.extraLinkFlags or [ ]);
       edition = crate.edition or null;
-      codegenUnits = crate.codegenUnits or 1;
+      codegenUnits = if crate ? codegenUnits then crate.codegenUnits else 1;
       extraRustcOpts =
         lib.optionals (crate ? extraRustcOpts) crate.extraRustcOpts
           ++ extraRustcOpts_