building Nix...
building the system configuration...
these derivations will be built:
  /nix/store/kf9vg36ac9ji695wyn3dxyp5af66wrdd-oh-my-zsh-2017-03-30.drv
  /nix/store/s5v1vcl4f9mlhpp0i5x5q8iffqsjbdag-system-path.drv
  /nix/store/4n2fiz6c2qkx27pxisri52wg7pcyjd0j-unit-systemd-fsck-.service.drv
  /nix/store/yipb2nfkx12kinjbjmfn7q501di3axlf-dbus-1.drv
  /nix/store/9rga51j343rjxrgly2rkqzb4iylbdsmk-unit-dbus.service.drv
  /nix/store/fb3cik8iwzszzim362ll8svjbi3gb8lm-unit-polkit.service.drv
  /nix/store/60rn4cbff5mvywq6h750ra30cb9njwzk-system-units.drv
  /nix/store/hqh3c1p5g0vka0dn6dgajpd46a45i1l2-etc-zshrc.drv
  /nix/store/s54lyai7lv0mv33cg3rzfi2cb4f60dql-unit-emacs.service.drv
  /nix/store/x0vxjl05mcl1zlsnw4hhb3hr5sqb1a2h-user-units.drv
  /nix/store/yjgfnkmrwg9jah78xz4d15q8hgvgjypy-etc.drv
  /nix/store/ax4vif95apchri61l8rj4v60wqqlgj8c-nixos-system-nixos-17.09pre105432.0f64656dca.drv
building path(s) ‘/nix/store/rxw2khwxjdh2snpz4q6vdxr1szdykp30-oh-my-zsh-2017-03-30’
installing
mkdir: cannot create directory '/nix/store/rxw2khwxjdh2snpz4q6vdxr1szdykp30-oh-my-zsh-2017-03-30/share/oh-my-zsh/custom/themes': Permission denied
builder for ‘/nix/store/kf9vg36ac9ji695wyn3dxyp5af66wrdd-oh-my-zsh-2017-03-30.drv’ failed with exit code 1
cannot build derivation ‘/nix/store/hqh3c1p5g0vka0dn6dgajpd46a45i1l2-etc-zshrc.drv’: 1 dependencies couldn't be built
cannot build derivation ‘/nix/store/s5v1vcl4f9mlhpp0i5x5q8iffqsjbdag-system-path.drv’: 1 dependencies couldn't be built
cannot build derivation ‘/nix/store/ax4vif95apchri61l8rj4v60wqqlgj8c-nixos-system-nixos-17.09pre105432.0f64656dca.drv’: 1 dependencies couldn't be built
error: build of ‘/nix/store/ax4vif95apchri61l8rj4v60wqqlgj8c-nixos-system-nixos-17.09pre105432.0f64656dca.drv’ failed