nix-shell -p geany
these paths will be fetched (0.06 MiB download, 0.31 MiB unpacked):
  /nix/store/b4kbdvdyb80r57jhx7665117k75v4jrl-stdenv-linux
  /nix/store/hzrq5ccamfkwdkl9gqqsh3ryprzvs044-bash-interactive-4.4-p23-dev
copying path '/nix/store/hzrq5ccamfkwdkl9gqqsh3ryprzvs044-bash-interactive-4.4-p23-dev' from 'https://cache.nixos.org'...
copying path '/nix/store/b4kbdvdyb80r57jhx7665117k75v4jrl-stdenv-linux' from 'https://cache.nixos.org'...