''
  # man pages (trailing : tells man to also search default paths)
  for p in $buildInputs; do
    if [ -d "$p/share/man" ]; then
      MANPATH="$p/share/man''${MANPATH:+:$MANPATH}"
    fi
  done
  export MANPATH="''${MANPATH:+$MANPATH:}"

  # zsh completions — stored in a custom var so direnv doesn't
  # overwrite zsh's default fpath
  NIX_ZSH_FPATH=""
  for p in $buildInputs; do
    if [ -d "$p/share/zsh/site-functions" ]; then
      NIX_ZSH_FPATH="$p/share/zsh/site-functions''${NIX_ZSH_FPATH:+:$NIX_ZSH_FPATH}"
    fi
  done
  export NIX_ZSH_FPATH
''