diff --git a/pkgs/build-support/rust/build-rust-crate/configure-crate.nix b/pkgs/build-support/rust/build-rust-crate/configure-crate.nix
index fd61d73deb72..c348885e44ca 100644
--- a/pkgs/build-support/rust/build-rust-crate/configure-crate.nix
+++ b/pkgs/build-support/rust/build-rust-crate/configure-crate.nix
@@ -195,7 +195,7 @@ in ''
          export CARGO_FEATURE_$feature=1
        done
 
-       target/build/${crateName}/build_script_build > target/build/${crateName}.opt
+       target/build/${crateName}/build_script_build | tee target/build/${crateName}.opt
      )
 
      set +e