- Lookup Haskell-related packages:
nix-env -f "<nixpkgs>" -qaP -A haskellPackages- Search for a package:
nix-env -qaP | grep package- Install package from local repository:
nix-env -i package -f /path/to/nixpkgs- Remove a package:
nix-env -e package- Try to build a Haskell package:
nix-build -A haskell.packages.ghc810.Glob '<nixpkgs>'- Try to build some package:
nix-build '<nixpkgs>' -A package- Set yourself in an environment like the one to build a package:
nix-shell --pure -p package --command sh- To do some bisecting on nixpkgs:
First, comment out non-important packages in configuration.nix, then:
sudo nixos-rebuild switch -I nixpkgs=/path/to/nixpkgsReboot if dealing with something startup-related
- Find a package specific to a language module:
nix-env -f "<nixpkgs>" -qaP -A haskellPackages
nix-env -f "<nixpkgs>" -qaP -A coqPackages_8_6- To try and delete a store path (whether derivation or output):
nix-store --delete /nix/store/path/to/thing/thing{,.drv}- To figure out why something can't be deleted (or what depends on it):
nix-store --query --roots /nix/store/path/to/thing/thing{,.drv}- To figure out why a derivation is dumping a very large path:
nix-instantiate --eval -E 'let d = import /path/to/derivation {}; in d.src'
cd /path/to/output/of/previous/command
du -h | sort -h