gistfile1.txt

[clever@amd-nixos:~]$ nix-repl
Welcome to Nix version 1.11.11. Type :? for help.

nix-repl> :l <nixpkgs>
Added 7733 variables.

nix-repl> stdenv.system
"x86_64-linux"

nix-repl> libs = {
                "i686-linux" = [
                  stdenv.cc.cc
                  qt4
                  libxml2
                  glibc
                  sane-backends
                  xorg.libXext
                  xorg.libX11
                  xorg.libXdmcp
                  xorg.libXau
                  xorg.libxcb
                ];
                "x86_64-linux" = [
                  stdenv.cc.cc
                  qt5
                  libxml2
                  glibc
                  sane-backends
                  xorg.libXext
                  xorg.libX11
                  xorg.libXdmcp
                  xorg.libXau
                  xorg.libxcb
                ];
              }

nix-repl> libs
{ i686-linux = [ ... ]; x86_64-linux = [ ... ]; }

nix-repl> libs."${stdenv.system}"
[ «derivation /nix/store/zqfdl228pbbdibjby1a7jxvf95h97v0w-gcc-5.4.0.drv» { ... } «deriv....

nix-repl> qt5
{ callPackage = «lambda»; env = { ... }; full = «derivation /nix/s