$ nixops deploy -d csl --evaluate-only --show-trace
error: while evaluating the attribute ‘config.deployment’ at /nix/store/hwhk1ps54q4vd5qfbr9xxyrk85qba54z-nixos-17.03.1052.aa0383397a/nixos/lib/attrsets.nix:199:44:
while evaluating anonymous function at /nix/store/hwhk1ps54q4vd5qfbr9xxyrk85qba54z-nixos-17.03.1052.aa0383397a/nixos/lib/options.nix:117:41, called from /nix/store/hwhk1ps54q4vd5qfbr9xxyrk85qba54z-nixos-17.03.1052.aa0383397a/nixos/lib/attrsets.nix:199:52:
while evaluating ‘scrubOptionValue’ at /nix/store/hwhk1ps54q4vd5qfbr9xxyrk85qba54z-nixos-17.03.1052.aa0383397a/nixos/lib/options.nix:113:22, called from /nix/store/hwhk1ps54q4vd5qfbr9xxyrk85qba54z-nixos-17.03.1052.aa0383397a/nixos/lib/options.nix:117:44:
while evaluating ‘isDerivation’ at /nix/store/hwhk1ps54q4vd5qfbr9xxyrk85qba54z-nixos-17.03.1052.aa0383397a/nixos/lib/attrsets.nix:295:18, called from /nix/store/hwhk1ps54q4vd5qfbr9xxyrk85qba54z-nixos-17.03.1052.aa0383397a/nixos/lib/options.nix:114:8:
while evaluating the attribute ‘config’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/lib/eval-config.nix:53:5:
while evaluating the attribute ‘config’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:87:25:
while evaluating ‘yieldConfig’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:74:29, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:73:16:
while evaluating the attribute ‘_module.check.value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:300:9:
while evaluating the option `_module.check':
while evaluating the attribute ‘isDefined’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:332:5:
while evaluating ‘filterOverrides’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:407:21, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:316:18:
while evaluating ‘concatMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix:79:18, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:413:8:
while evaluating ‘concatMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix:79:18, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:311:17:
while evaluating ‘concatMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix:79:18, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:196:19:
while evaluating ‘concatMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix:79:18, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:180:8:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:180:19, called from undefined position:
while evaluating ‘pushDownProperties’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:354:24, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:180:75:
while evaluating ‘concatMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix:79:18, called from /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:356:7:
while evaluating ‘pushDownProperties’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:354:24, called from undefined position:
value is a function while a set was expected, at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:129:29
error: evaluation of the deployment specification failed