The exports option can only be set when binary is set to bash

[jcf]

Describe the bug

I updated devenv and my flake inputs and ran into this error I've never seen before:

       error: Failed assertions:
       - The 'exports' option can only be set when 'binary' is set to 'bash'.
✖ Building shell in 741ms
Error:   × Command `/nix/store/13aiq5113vphpn4j8rrhp60srw2kxqrr-nix-2.24-devenv/bin/nix --show-trace --extra-experimental-features nix-command --extra-experimental-features flakes --option warn-dirty false --keep-going
  │ --max-jobs 5 --option eval-cache false --option extra-substituters https://devenv.cachix.org --option extra-trusted-public-keys devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw= print-dev-env
  │ --profile /Users/jcf/.config/setup/.devenv/gc/shell -vv --log-format internal-json` failed with with exit code 1

direnv: failed to build the devenv environment. devenv.nix may contain errors. see above.

I don't set any exports or shell so suspect this issue comes from outside of my configuration.

To reproduce

https://gist.github.com/jcf/bb673bef459e72d3459d4b9a6ade1aca

direnv reload

direnv: loading ~/.config/setup/.envrc
direnv: loading https://raw.githubusercontent.com/cachix/devenv/ee1b50e916819cfa82624df3787a7d04151bcc63/direnvrc (sha256-+tK7sFBNn+c1Zgr10WcUvCzSTp+Hhn/0m3E2FW/DA1Y=)
direnv: using devenv
• Building shell ...
• Using Cachix: devenv
error:
       … from call site
         at /Users/jcf/.config/setup/.devenv.flake.nix:155:34:
          154|           build = build project.options project.config;
          155|           devShell."${system}" = config.shell;
             |                                  ^
          156|         };

       … while calling anonymous lambda
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/attrsets.nix:1204:18:
         1203|         mapAttrs
         1204|           (name: value:
             |                  ^
         1205|             if isAttrs value && cond value

       … from call site
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/attrsets.nix:1207:18:
         1206|             then recurse (path ++ [ name ]) value
         1207|             else f (path ++ [ name ]) value);
             |                  ^
         1208|     in

       … while calling anonymous lambda
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:256:72:
          255|           # For definitions that have an associated option
          256|           declaredConfig = mapAttrsRecursiveCond (v: ! isOption v) (_: v: v.value) options;
             |                                                                        ^
          257|

       … while evaluating the attribute 'value'
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:927:9:
          926|     in warnDeprecation opt //
          927|       { value = addErrorContext "while evaluating the option `${showOption loc}':" value;
             |         ^
          928|         inherit (res.defsFinal') highestPrio;

       … while evaluating the option `shell':

       … while evaluating the attribute 'mergedValue'
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:962:5:
          961|     # Type-check the remaining definitions, and merge them. Or throw if no definitions.
          962|     mergedValue =
             |     ^
          963|       if isDefined then

       … while evaluating a branch condition
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:963:7:
          962|     mergedValue =
          963|       if isDefined then
             |       ^
          964|         if all (def: type.check def.value) defsFinal then type.merge loc defsFinal

       … while evaluating the attribute 'values'
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:956:9:
          955|       in {
          956|         values = defs''';
             |         ^
          957|         inherit (defs'') highestPrio;

       … while evaluating a branch condition
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:952:11:
          951|           # Avoid sorting if we don't have to.
          952|           if any (def: def.value._type or "" == "order") defs''.values
             |           ^
          953|           then sortProperties defs''.values

       … while calling the 'any' builtin
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:952:14:
          951|           # Avoid sorting if we don't have to.
          952|           if any (def: def.value._type or "" == "order") defs''.values
             |              ^
          953|           then sortProperties defs''.values

       … while evaluating the attribute 'values'
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:1079:7:
         1078|     in {
         1079|       values = concatMap (def: if getPrio def == highestPrio then [(strip def)] else []) defs;
             |       ^
         1080|       inherit highestPrio;

       … while calling the 'concatMap' builtin
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:1079:16:
         1078|     in {
         1079|       values = concatMap (def: if getPrio def == highestPrio then [(strip def)] else []) defs;
             |                ^
         1080|       inherit highestPrio;

       … while calling the 'concatMap' builtin
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:942:17:
          941|         # Process mkMerge and mkIf properties.
          942|         defs' = concatMap (m:
             |                 ^
          943|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))

       … while calling anonymous lambda
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:942:28:
          941|         # Process mkMerge and mkIf properties.
          942|         defs' = concatMap (m:
             |                            ^
          943|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))

       … while calling the 'map' builtin
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:943:11:
          942|         defs' = concatMap (m:
          943|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))
             |           ^
          944|         ) defs;

       … while evaluating definitions from `«github:cachix/devenv/8ebde3cd7f36655cd75bb5eb5702f6fb6bf2f915»/src/modules/top-level.nix':

       … from call site
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:943:128:
          942|         defs' = concatMap (m:
          943|           map (value: { inherit (m) file; inherit value; }) (addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))
             |                                                                                                                                ^
          944|         ) defs;

       … while calling 'dischargeProperties'
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:1030:25:
         1029|   */
         1030|   dischargeProperties = def:
             |                         ^
         1031|     if def._type or "" == "merge" then

       … while evaluating a branch condition
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:1031:5:
         1030|   dischargeProperties = def:
         1031|     if def._type or "" == "merge" then
             |     ^
         1032|       concatMap dischargeProperties def.contents

       … while evaluating the attribute 'value'
         at «github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93»/lib/modules.nix:665:53:
          664|                 (n: value:
          665|                   [{ inherit (module) file; inherit value; }]
             |                                                     ^
          666|                 )

       … while calling the 'throw' builtin
         at «github:cachix/devenv/8ebde3cd7f36655cd75bb5eb5702f6fb6bf2f915»/src/modules/top-level.nix:31:7:
           30|     then
           31|       throw ''
             |       ^
           32|         Failed assertions:

       error:
       error: Failed assertions:
       - The 'exports' option can only be set when 'binary' is set to 'bash'.
✖ Building shell in 741ms
Error:   × Command `/nix/store/13aiq5113vphpn4j8rrhp60srw2kxqrr-nix-2.24-devenv/bin/nix --show-trace --extra-experimental-features nix-command --extra-experimental-features flakes --option warn-dirty false --keep-going
  │ --max-jobs 5 --option eval-cache false --option extra-substituters https://devenv.cachix.org --option extra-trusted-public-keys devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw= print-dev-env
  │ --profile /Users/jcf/.config/setup/.devenv/gc/shell -vv --log-format internal-json` failed with with exit code 1

direnv: failed to build the devenv environment. devenv.nix may contain errors. see above.
direnv: export +DEVENV_DIRENVRC_ROLLING_UPGRADE +DEVENV_DIRENVRC_VERSION

Version

$ devenv version
devenv 1.4.1 (aarch64-darwin)

[jcf]

Rolling nixpkgs back to the rolling cachix release fixes the above issue.

inputs:
  nixpkgs:
    url: "github:cachix/devenv-nixpkgs/rolling"
  devenv:
    url: "github:cachix/devenv"

Unfortunately, I need newer packages in a number of projects, which precludes me from using December 2024 nixpkgs.

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/c414ff73140fe4398d3d7752a9f18e65ef89fc93' (2025-02-22)
  → 'github:cachix/devenv-nixpkgs/7bd9e84d0452f6d2e63b6e6da29fe73fac951857' (2024-12-06)

[sandydoo]

Thanks!

[sandydoo]

More fixes are needed for nixpkgs/master: #1745