Running phase: unpackPhase
unpacking sources
Running phase: patchPhase
patching sources
Running phase: installPhase
installing
Running phase: fixupPhase
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/d2f29apmrki51s68y948nl7hm7j24l2q-clang-wrapper-9.0.1
patching script interpreter paths in /nix/store/d2f29apmrki51s68y948nl7hm7j24l2q-clang-wrapper-9.0.1
checking for references to /build/ in /nix/store/d2f29apmrki51s68y948nl7hm7j24l2q-clang-wrapper-9.0.1...
substituteStream(): WARNING: pattern '
' doesn't match anything in file '/nix/store/d2f29apmrki51s68y948nl7hm7j24l2q-clang-wrapper-9.0.1/nix-support/libc-ldflags'
substituteStream(): WARNING: pattern '
' doesn't match anything in file '/nix/store/d2f29apmrki51s68y948nl7hm7j24l2q-clang-wrapper-9.0.1/nix-support/libcxx-ldflags'