Definitions conflict when using Lix

[HPCesia]

Way to reproduce:

nix flake init -t github:denful/den#minimal
nix flake update
nix run nixpkgs#lix -- repl . --show-trace

outputs

Lix 2.94.2
Type :? for help.
error:
       … while calling anonymous lambda
         at «string»:2:23:
            1|
            2| lockFileStr: rootSrc: rootSubdir:
             |                       ^
            3|

       … from call site
         at «string»:73:10:
           72| in
           73| allNodes.${lockFile.root}
             |          ^
           74|

       … while calling anonymous lambda
         at «string»:9:10:
            8|   allNodes = builtins.mapAttrs (
            9|     key: node:
             |          ^
           10|     let

       … while evaluating result
         at «string»:68:7:
           67|       assert builtins.isFunction flake.outputs;
           68|       result
             |       ^
           69|     else

       … while evaluating outputs
         at «string»:49:9:
           48|       result =
           49|         outputs
             |         ^
           50|         # We add the sourceInfo attribute for its metadata, as they are

       … from call site
         at «string»:46:17:
           45|
           46|       outputs = flake.outputs (inputs // { self = result; });
             |                 ^
           47|

       … while calling 'outputs'
         at /nix/store/dkl3bjkmfh0imiwyv2pv4ygnz44b3rwh-source/flake.nix:3:5:
            2|   outputs =
            3|     inputs:
             |     ^
            4|     (inputs.nixpkgs.lib.evalModules {

       … while evaluating the attribute 'config.flake'
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:402:9:
          401|         options = checked options;
          402|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          403|         _module = checked (config._module);

       … while evaluating an expression to select 'flake' on it
         at /nix/store/dkl3bjkmfh0imiwyv2pv4ygnz44b3rwh-source/flake.nix:7:15:
            6|       specialArgs = { inherit inputs; };
            7|     }).config.flake;
             |               ^
            8|

       … while calling the 'seq' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:402:18:
          401|         options = checked options;
          402|         config = checked (removeAttrs config [ "_module" ]);
             |                  ^
          403|         _module = checked (config._module);

       … while evaluating an expression to select '_module.check' on it
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:305:12:
          304|       checkUnmatched =
          305|         if config._module.check && config._module.freeformType == null && merged.unmatchedDefns != [ ] then
             |            ^
          306|           let

       … while evaluating config
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:305:12:
          304|       checkUnmatched =
          305|         if config._module.check && config._module.freeformType == null && merged.unmatchedDefns != [ ] then
             |            ^
          306|           let

       … while evaluating an expression to select '_module.freeformType' on it
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:296:12:
          295|         in
          296|         if declaredConfig._module.freeformType == null then
             |            ^
          297|           declaredConfig

       … while evaluating declaredConfig
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:296:12:
          295|         in
          296|         if declaredConfig._module.freeformType == null then
             |            ^
          297|           declaredConfig

       … from call site
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:283:28:
          282|           # For definitions that have an associated option
          283|           declaredConfig = mapAttrsRecursiveCond (v: !isOption v) (_: v: v.value) options;
             |                            ^
          284|

       … while calling 'mapAttrsRecursiveCond'
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/attrsets.nix:1182:14:
         1181|   mapAttrsRecursiveCond =
         1182|     cond: f: set:
             |              ^
         1183|     let

       … while calling the 'mapAttrs' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/attrsets.nix:1191:5:
         1190|     in
         1191|     recurse [ ] set;
             |     ^
         1192|

       … while evaluating the attribute 'matchedOptions'
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:935:15:
          934|     {
          935|       inherit matchedOptions;
             |               ^
          936|

       … while calling the 'mapAttrs' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:925:24:
          924|
          925|       matchedOptions = mapAttrs (n: v: v.matchedOptions) resultsByName;
             |                        ^
          926|

       … while calling the 'mapAttrs' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:873:23:
          872|
          873|       resultsByName = mapAttrs (
             |                       ^
          874|         name: decls:

       … while calling the 'zipAttrsWith' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:789:21:
          788|       # an attrset 'name' => list of submodules that declare ‘name’.
          789|       declsByName = zipAttrs (
             |                     ^
          790|         map (

       … while calling the 'map' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:790:9:
          789|       declsByName = zipAttrs (
          790|         map (
             |         ^
          791|           module:

       … from call site
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:275:37:
          274|
          275|       merged = mergeModules prefix (reverseList (doCollect { }).modules);
             |                                     ^
          276|

       … while calling 'reverseList'
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/lists.nix:1123:5:
         1122|   reverseList =
         1123|     xs:
             |     ^
         1124|     let

       … while calling the 'genList' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/lists.nix:1127:5:
         1126|     in
         1127|     genList (n: elemAt xs (l - n - 1)) l;
             |     ^
         1128|

       … while evaluating the second argument passed to builtins.genList

       … while calling the 'length' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/lists.nix:1125:11:
         1124|     let
         1125|       l = length xs;
             |           ^
         1126|     in

       … while evaluating the attribute 'modules'
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:591:7:
          590|     modulesPath: initialModules: args: {
          591|       modules = filterModules modulesPath (collectStructuredModules unknownModule "" initialModules args);
             |       ^
          592|       # Intentionally not shared with `modules` above: this allows

       … from call site
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:591:17:
          590|     modulesPath: initialModules: args: {
          591|       modules = filterModules modulesPath (collectStructuredModules unknownModule "" initialModules args);
             |                 ^
          592|       # Intentionally not shared with `modules` above: this allows

       … while calling 'filterModules'
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:566:9:
          565|         modulesPath:
          566|         { disabled, modules }:
             |         ^
          567|         let

       … while calling the 'map' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:570:9:
          569|         in
          570|         map (attrs: attrs.module) (genericClosure {
             |         ^
          571|           startSet = keyFilter modules;

       … while calling the 'genericClosure' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:570:36:
          569|         in
          570|         map (attrs: attrs.module) (genericClosure {
             |                                    ^
          571|           startSet = keyFilter modules;

       … while calling the 'filter' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:571:22:
          570|         map (attrs: attrs.module) (genericClosure {
          571|           startSet = keyFilter modules;
             |                      ^
          572|           operator = attrs: keyFilter attrs.modules;

       … while calling anonymous lambda
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:568:31:
          567|         let
          568|           keyFilter = filter (attrs: !isDisabled modulesPath disabled attrs);
             |                               ^
          569|         in

       … from call site
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:568:39:
          567|         let
          568|           keyFilter = filter (attrs: !isDisabled modulesPath disabled attrs);
             |                                       ^
          569|         in

       … while calling anonymous lambda
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:497:9:
          496|         in
          497|         structuredModule: elem structuredModule.key disabledKeys;
             |         ^
          498|

       … while calling the 'elem' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:497:27:
          496|         in
          497|         structuredModule: elem structuredModule.key disabledKeys;
             |                           ^
          498|

       … while calling the 'concatMap' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:495:26:
          494|
          495|           disabledKeys = concatMap ({ file, disabled }: map (moduleKey file) disabled) disabledList;
             |                          ^
          496|         in

       … while calling the 'concatLists' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:527:24:
          526|           collectResults = modules: {
          527|             disabled = concatLists (catAttrs "disabled" modules);
             |                        ^
          528|             inherit modules;

       … while evaluating the attribute 'disabled'
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:527:13:
          526|           collectResults = modules: {
          527|             disabled = concatLists (catAttrs "disabled" modules);
             |             ^
          528|             inherit modules;

       (7 duplicate frames omitted)

       … while evaluating an expression to select 'disabledModules' on it
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:545:22:
          544|                 (
          545|                   if module.disabledModules != [ ] then
             |                      ^
          546|                     [

       … while evaluating module
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:545:22:
          544|                 (
          545|                   if module.disabledModules != [ ] then
             |                      ^
          546|                     [

       … from call site
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:536:24:
          535|             let
          536|               module = checkModule (loadModule args parentFile "${parentKey}:anon-${toString n}" x);
             |                        ^
          537|               collectedImports = collectStructuredModules module._file module.key module.imports args;

       … while calling anonymous lambda
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:468:11:
          467|         else
          468|           m: m;
             |           ^
          469|

       … while evaluating m
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:468:14:
          467|         else
          468|           m: m;
             |              ^
          469|

       … from call site
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:536:37:
          535|             let
          536|               module = checkModule (loadModule args parentFile "${parentKey}:anon-${toString n}" x);
             |                                     ^
          537|               collectedImports = collectStructuredModules module._file module.key module.imports args;

       … while calling 'loadModule'
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:420:42:
          419|       loadModule =
          420|         args: fallbackFile: fallbackKey: m:
             |                                          ^
          421|         if isFunction m then

       … from call site
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:449:11:
          448|         else
          449|           unifyModuleSyntax (toString m) (toString m) (
             |           ^
          450|             applyModuleArgsIfFunction (toString m) (import m) args

       … while calling 'unifyModuleSyntax'
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:635:16:
          634|   unifyModuleSyntax =
          635|     file: key: m:
             |                ^
          636|     let

       … while evaluating m
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:656:8:
          655|     in
          656|     if m ? config || m ? options then
             |        ^
          657|       let

       … from call site
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:450:13:
          449|           unifyModuleSyntax (toString m) (toString m) (
          450|             applyModuleArgsIfFunction (toString m) (import m) args
             |             ^
          451|           );

       … while calling 'applyModuleArgsIfFunction'
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:705:13:
          704|   applyModuleArgsIfFunction =
          705|     key: f: args@{ config, ... }: if isFunction f then applyModuleArgs key f args else f;
             |             ^
          706|

       … from call site
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:705:38:
          704|   applyModuleArgsIfFunction =
          705|     key: f: args@{ config, ... }: if isFunction f then applyModuleArgs key f args else f;
             |                                      ^
          706|

       … while calling anonymous lambda
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/trivial.nix:1131:5:
         1130|     in
         1131|     f: isFunction f || (f ? __functor && isFunction (f.__functor f));
             |     ^
         1132|

       … while calling the 'isFunction' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/trivial.nix:1131:8:
         1130|     in
         1131|     f: isFunction f || (f ? __functor && isFunction (f.__functor f));
             |        ^
         1132|

       … while calling the 'import' builtin
         at /nix/store/gw7fxaw8z5szcqlzyzcnrshzi60zj664-source/lib/modules.nix:450:53:
          449|           unifyModuleSyntax (toString m) (toString m) (
          450|             applyModuleArgsIfFunction (toString m) (import m) args
             |                                                     ^
          451|           );

       error: attribute 'user' already defined at /nix/store/93pqgns6g0aj20aazyj1bflc8sxick3m-source/modules/options.nix:127:5
       at /nix/store/93pqgns6g0aj20aazyj1bflc8sxick3m-source/modules/options.nix:90:3:
           89|   # Built-in entity topology: users nest inside hosts, homes nest inside hosts.
           90|   config.den.schema.user.parent = "host";
             |   ^
           91|   config.den.schema.home.parent = "host";

This issue does not occur in the original Nix.

[fmway]

Surprisingly, when i tried to open in the editor (file: /modules/options.nix), i got the same error by nixd lsp 🫪.

[fmway]

Should be fixed by #616