nix-config/notes/zlib.md

Zlib issues

Remove default cabal environment (to fix ghcide 'cannot satisfy ghc...' error):

rm ~/.ghc/x86_64-linux-8.6.5/environments/default

Create symlinks to header files (search with nix-locate):

sudo ln -s /nix/store/j3anl3dw9f22g711g0y1bdn3hphgd4np-zlib-1.2.11-dev/include/zlib.h ~/.nix-profile/include/zlib.h

sudo ln -s /nix/store/j3anl3dw9f22g711g0y1bdn3hphgd4np-zlib-1.2.11-dev/include/zconf.h ~/.nix-profile/include/zconf.h

Export include and lib directories:

export CPATH=~/.nix-profile/include
export LIBRARY_PATH=~/.nix-profile/lib

Related issues

• https://github.com/haskell/cabal/issues/6228
• https://github.com/NixOS/nixpkgs/issues/44144