adisbladis:  I tried adding 
```elisp
(setq comp-async-env-modifier-form '((concat "LIBRARY_PATH="
        "/nix/store/wfvfxj1w9gj21nbai6rsyhwvkbqf59w0-libgccjit-9.3.0/lib/gcc/x86_64-unknown-linux-gnu/9.3.0:"
        "/nix/store/a6z7ighixg7gb6krf9k60ylgmahij63x-gcc-9.3.0-lib/lib:"
        "/nix/store/jx19wa4xlh9n4324xdl9rjnykd19mmq3-glibc-2.30/lib:"
  )))
```
to my init.el, but it doesn't seem to be working