diff --git a/pkgs/build-support/rust/build-rust-crate/default.nix b/pkgs/build-support/rust/build-rust-crate/default.nix
index 9ceda041b665..dfe28cc334b5 100644
--- a/pkgs/build-support/rust/build-rust-crate/default.nix
+++ b/pkgs/build-support/rust/build-rust-crate/default.nix
@@ -49,6 +49,8 @@ let
           filename =
             if lib.any (x: x == "lib" || x == "rlib") dep.crateType
             then "${dep.metadata}.rlib"
+            # Adjust lib filename for crates of type proc-macro. Proc macros are compiled/run on the build platform architecture.
+            else if (lib.attrByPath [ "procMacro" ] false dep) then "${dep.metadata}${stdenv.buildPlatform.extensions.library}"
             else "${dep.metadata}${stdenv.hostPlatform.extensions.library}";
         in
         " --extern ${opts}${name}=${dep.lib}/lib/lib${extern}-${filename}"