The option `nixpkgs.pkgs' is used but not defined.

[spikespaz]

The full trace is included at the bottom. I am trying to use flake-compat as a shim to generate a configuration.nix for nixos-install since the installer seems to be broken in many weird ways.

I tried to debug the installer, but the issue is fundamentally with the output of the flake, and it doesn't seem to set up a new system correctly. For example, writing the ISO's fstab to /mnt/etc rather than the one generated by my flake's activation script.

I have some glue code (bash) around these lines:

cat <<- EOF > "$root_dir/etc/nixos/configuration.nix"
	(import (builtins.fetchTarball {
		url = "$FLAKE_COMPAT_TARBALL_URL";
		sha256 = "$FLAKE_COMPAT_TARBALL_HASH";
	}) {src = "$flake_path";}).defaultNix.nixosConfigurations.$host_name.config
EOF

Obviously $root_dir, $flake_path, and $host_name are handled elsewhere in the shell script. The flake is pre-built and sent over to the store at /mnt/nix/store before running nixos-install (on $root_dir which is /mnt).

I have attempted to follow the trace myself to determine if I can do something about it -- alas I am not experienced enough. I feel that it is worth note that I perform an explicit import of nixpkgs (that is a link to my flake.nix).

I would like to know if I am using the wrong attribute path (in configuration.nix) or something, and if the issue is that nixpkgs.pkgs is not being evaluated properly. If it is being evaluated correctly by flake-compat, I would like to know what wants nixpkgs.pkgs, I do not see any occurrence in my code.

Thanks.

When running nixos-install, I see the following:

error: The option `nixpkgs.pkgs' is used but not defined.

       … while evaluating the attribute 'mergedValue'

       at /mnt/nix/store/x20avpqcrk6my01n6h1blfslb6l4imw2-source/lib/modules.nix:747:5:

          746|     £ Type-check the remaining definitions, and merge them. Or throw if no definitions.
          747|     mergedValue =
             |     ^
          748|       if isDefined then

       … while evaluating the option `nixpkgs.pkgs':

       … while evaluating the attribute 'value'

       at /mnt/nix/store/x20avpqcrk6my01n6h1blfslb6l4imw2-source/lib/modules.nix:712:9:

          711|     in warnDeprecation opt //
          712|       { value = builtins.addErrorContext "while evaluating the option `${showOption loc}':" value;
             |         ^
          713|         inherit (res.defsFinal') highestPrio;

       … while evaluating anonymous lambda

       at /mnt/nix/store/x20avpqcrk6my01n6h1blfslb6l4imw2-source/lib/modules.nix:265:72:

          264|           £ For definitions that have an associated option
          265|           declaredConfig = mapAttrsRecursiveCond (v: ! isOption v) (_: v: v.value) options;
             |                                                                        ^
          266|

       … from call site

       at /mnt/nix/store/x20avpqcrk6my01n6h1blfslb6l4imw2-source/lib/attrsets.nix:401:20:

          400|               then recurse (path ++ [name]) value
          401|               else f (path ++ [name]) value;
             |                    ^
          402|         in mapAttrs g;

       … while evaluating 'g'

       at /mnt/nix/store/x20avpqcrk6my01n6h1blfslb6l4imw2-source/lib/attrsets.nix:398:19:

          397|           g =
          398|             name: value:
             |                   ^
          399|             if isAttrs value && cond value

       … from call site

       … while evaluating the attribute 'value'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:581:44:

          580|       defnsByName' = byName "config" (module: value:
          581|           [{ inherit (module) file; inherit value; }]
             |                                            ^
          582|         ) configs;

       … while evaluating 'dischargeProperties'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:832:25:

          831|   */
          832|   dischargeProperties = def:
             |                         ^
          833|     if def._type or "" == "merge" then

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:761:137:

          760|         defs' = concatMap (m:
          761|           map (value: { inherit (m) file; inherit value; }) (builtins.addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))
             |                                                                                                                                         ^
          762|         ) defs;

       … while evaluating definitions from `/mnt/etc/nixos/configuration.nix':

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:760:28:

          759|         £ Process mkMerge and mkIf properties.
          760|         defs' = concatMap (m:
             |                            ^
          761|           map (value: { inherit (m) file; inherit value; }) (builtins.addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:760:17:

          759|         £ Process mkMerge and mkIf properties.
          760|         defs' = concatMap (m:
             |                 ^
          761|           map (value: { inherit (m) file; inherit value; }) (builtins.addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))

       … while evaluating the attribute 'values'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:873:7:

          872|     in {
          873|       values = concatMap (def: if getPrio def == highestPrio then [(strip def)] else []) defs;
             |       ^
          874|       inherit highestPrio;

       … while evaluating the attribute 'values'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:774:9:

          773|       in {
          774|         values = defs''';
             |         ^
          775|         inherit (defs'') highestPrio;

       … while evaluating the attribute 'isDefined'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:790:5:

          789|
          790|     isDefined = defsFinal != [];
             |     ^
          791|

       … while evaluating the attribute 'pkgs.isDefined'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:750:22:

          749|         files = map (def: def.file) res.defsFinal;
          750|         inherit (res) isDefined;
             |                      ^
          751|         £ This allows options to be correctly displayed using `${options.path.to.it}`

       … while evaluating the attribute 'value'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/types.nix:461:58:

          460|         £ Push down position info.
          461|         (map (def: mapAttrs (n: v: { inherit (def) file; value = v; }) def.value) defs);
             |                                                          ^
          462|       emptyValue = { value = {}; };

       … while evaluating 'dischargeProperties'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:832:25:

          831|   */
          832|   dischargeProperties = def:
             |                         ^
          833|     if def._type or "" == "merge" then

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:761:137:

          760|         defs' = concatMap (m:
          761|           map (value: { inherit (m) file; inherit value; }) (builtins.addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))
             |                                                                                                                                         ^
          762|         ) defs;

       … while evaluating definitions from `/nix/var/nix/profiles/per-user/root/channels/nixos/nixos/modules/misc/nixpkgs.nix':

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:760:28:

          759|         £ Process mkMerge and mkIf properties.
          760|         defs' = concatMap (m:
             |                            ^
          761|           map (value: { inherit (m) file; inherit value; }) (builtins.addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:760:17:

          759|         £ Process mkMerge and mkIf properties.
          760|         defs' = concatMap (m:
             |                 ^
          761|           map (value: { inherit (m) file; inherit value; }) (builtins.addErrorContext "while evaluating definitions from `${m.file}':" (dischargeProperties m.value))

       … while evaluating the attribute 'values'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:873:7:

          872|     in {
          873|       values = concatMap (def: if getPrio def == highestPrio then [(strip def)] else []) defs;
             |       ^
          874|       inherit highestPrio;

       … while evaluating the attribute 'values'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:774:9:

          773|       in {
          774|         values = defs''';
             |         ^
          775|         inherit (defs'') highestPrio;

       … while evaluating the attribute 'optionalValue.value'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:792:5:

          791|
          792|     optionalValue =
             |     ^
          793|       if isDefined then { value = mergedValue; }

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/types.nix:455:29:

          454|       merge = loc: defs:
          455|         zipAttrsWith (name: defs:
             |                             ^
          456|           let merged = mergeDefinitions (loc ++ [name]) elemType defs;

       … from call site

       … while evaluating the module argument `pkgs' in "/nix/var/nix/profiles/per-user/root/channels/nixos/nixos/modules/services/hardware/bluetooth.nix":

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:494:44:

          493|       context = name: ''while evaluating the module argument `${name}' in "${key}":'';
          494|       extraArgs = builtins.mapAttrs (name: _:
             |                                            ^
          495|         builtins.addErrorContext (context name)

       … from call site

       … while evaluating the attribute 'type.getSubModules'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/nixos/modules/services/hardware/bluetooth.nix:71:9:

           70|       settings = mkOption {
           71|         type = cfgFmt.type;
             |         ^
           72|         default = { };

       … while evaluating 'fixupOptionType'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:893:26:

          892|   £ TODO: Merge this into mergeOptionDecls
          893|   fixupOptionType = loc: opt:
             |                          ^
          894|     if opt.type.getSubModules or null == null

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:609:23:

          608|           if length optionDecls == length decls then
          609|             let opt = fixupOptionType loc (mergeOptionDecls loc decls);
             |                       ^
          610|             in {

       … while evaluating 'warnIf'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/trivial.nix:350:18:

          349|   */
          350|   warnIf = cond: msg: if cond then warn msg else x: x;
             |                  ^
          351|

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:742:9:

          741|       warnDeprecation =
          742|         warnIf (opt.type.deprecationMessage != null)
             |         ^
          743|           "The type `types.${opt.type.name}' of option `${showOption loc}' defined in ${showFiles opt.declarations} is deprecated. ${opt.type.deprecationMessage}";

       … while evaluating 'evalOptionValue'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:717:31:

          716|      config value. */
          717|   evalOptionValue = loc: opt: defs:
             |                               ^
          718|     let

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:611:32:

          610|             in {
          611|               matchedOptions = evalOptionValue loc opt defns';
             |                                ^
          612|               unmatchedDefns = [];

       … while evaluating the attribute 'matchedOptions'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:611:15:

          610|             in {
          611|               matchedOptions = evalOptionValue loc opt defns';
             |               ^
          612|               unmatchedDefns = [];

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:642:37:

          641|
          642|       matchedOptions = mapAttrs (n: v: v.matchedOptions) resultsByName;
             |                                     ^
          643|

       … from call site

       … while evaluating 'attrByPath'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:24:35:

           23|   */
           24|   attrByPath = attrPath: default: e:
             |                                   ^
           25|     let attr = head attrPath;

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:29:12:

           28|       else if e ? ${attr}
           29|       then attrByPath (tail attrPath) default e.${attr}
             |            ^
           30|       else default;

       … while evaluating 'attrByPath'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:24:35:

           23|   */
           24|   attrByPath = attrPath: default: e:
             |                                   ^
           25|     let attr = head attrPath;

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:29:12:

           28|       else if e ? ${attr}
           29|       then attrByPath (tail attrPath) default e.${attr}
             |            ^
           30|       else default;

       … while evaluating 'attrByPath'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:24:35:

           23|   */
           24|   attrByPath = attrPath: default: e:
             |                                   ^
           25|     let attr = head attrPath;

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:29:12:

           28|       else if e ? ${attr}
           29|       then attrByPath (tail attrPath) default e.${attr}
             |            ^
           30|       else default;

       … while evaluating 'attrByPath'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:24:35:

           23|   */
           24|   attrByPath = attrPath: default: e:
             |                                   ^
           25|     let attr = head attrPath;

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:1160:26:

         1159|         (abort "Renaming error: option `${showOption to}' does not exist.");
         1160|       toType = let opt = attrByPath to {} options; in opt.type or (types.submodule {});
             |                          ^
         1161|     in

       … while evaluating 'optionalAttrs'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:453:25:

          452|   */
          453|   optionalAttrs = cond: as: if cond then as else {};
             |                         ^
          454|

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:1167:12:

         1166|         apply = x: use (toOf config);
         1167|       } // optionalAttrs (toType != null) {
             |            ^
         1168|         type = toType;

       … while evaluating 'atDepth'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:60:17:

           59|       len = length attrPath;
           60|       atDepth = n:
             |                 ^
           61|         if n == len

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:63:39:

           62|         then value
           63|         else { ${elemAt attrPath n} = atDepth (n + 1); };
             |                                       ^
           64|     in atDepth 0;

       … while evaluating the attribute 'options'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:573:38:

          572|       declsByName = byName "options" (module: option:
          573|           [{ inherit (module) _file; options = option; }]
             |                                      ^
          574|         ) options;

       … while evaluating 'isType'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/types.nix:71:18:

           70| rec {
           71|   isType = type: x: (x._type or "") == type;
             |                  ^
           72|

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:606:36:

          605|           defns' = defnsByName'.${name} or [];
          606|           optionDecls = filter (m: isOption m.options) decls;
             |                                    ^
          607|         in

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:606:33:

          605|           defns' = defnsByName'.${name} or [];
          606|           optionDecls = filter (m: isOption m.options) decls;
             |                                 ^
          607|         in

       … from call site

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:600:39:

          599|
          600|       resultsByName = mapAttrs (name: decls:
             |                                       ^
          601|         £ We're descending into attribute ‘name’.

       … from call site

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:647:22:

          646|         £ Propagate all unmatched definitions from nested option sets
          647|         mapAttrs (n: v: v.unmatchedDefns) resultsByName
             |                      ^
          648|         £ Plus the definitions for the current prefix that don't have a matching option

       … from call site

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:661:46:

          660|         else
          661|           concatLists (mapAttrsToList (name: defs:
             |                                              ^
          662|             map (def: def // {

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:356:16:

          355|   mapAttrsToList = f: attrs:
          356|     map (name: f name attrs.${name}) (attrNames attrs);
             |                ^
          357|

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:356:10:

          355|   mapAttrsToList = f: attrs:
          356|     map (name: f name attrs.${name}) (attrNames attrs);
             |          ^
          357|

       … from call site

       … while evaluating the attribute 'unmatchedDefns'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:654:7:

          653|       £ Transforms unmatchedDefnsByName into a list of definitions
          654|       unmatchedDefns =
             |       ^
          655|         if configs == []

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:647:22:

          646|         £ Propagate all unmatched definitions from nested option sets
          647|         mapAttrs (n: v: v.unmatchedDefns) resultsByName
             |                      ^
          648|         £ Plus the definitions for the current prefix that don't have a matching option

       … from call site

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:661:46:

          660|         else
          661|           concatLists (mapAttrsToList (name: defs:
             |                                              ^
          662|             map (def: def // {

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:356:16:

          355|   mapAttrsToList = f: attrs:
          356|     map (name: f name attrs.${name}) (attrNames attrs);
             |                ^
          357|

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:356:10:

          355|   mapAttrsToList = f: attrs:
          356|     map (name: f name attrs.${name}) (attrNames attrs);
             |          ^
          357|

       … from call site

       … while evaluating the attribute 'unmatchedDefns'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:654:7:

          653|       £ Transforms unmatchedDefnsByName into a list of definitions
          654|       unmatchedDefns =
             |       ^
          655|         if configs == []

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:647:22:

          646|         £ Propagate all unmatched definitions from nested option sets
          647|         mapAttrs (n: v: v.unmatchedDefns) resultsByName
             |                      ^
          648|         £ Plus the definitions for the current prefix that don't have a matching option

       … from call site

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:661:46:

          660|         else
          661|           concatLists (mapAttrsToList (name: defs:
             |                                              ^
          662|             map (def: def // {

       … from call site

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:356:16:

          355|   mapAttrsToList = f: attrs:
          356|     map (name: f name attrs.${name}) (attrNames attrs);
             |                ^
          357|

       … while evaluating anonymous lambda

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:356:10:

          355|   mapAttrsToList = f: attrs:
          356|     map (name: f name attrs.${name}) (attrNames attrs);
             |          ^
          357|

       … from call site

       … while evaluating the attribute 'unmatchedDefns'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:654:7:

          653|       £ Transforms unmatchedDefnsByName into a list of definitions
          654|       unmatchedDefns =
             |       ^
          655|         if configs == []

       … while evaluating the attribute 'config.system.build.toplevel'

       at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:363:9:

          362|         options = checked options;
          363|         config = checked (removeAttrs config [ "_module" ]);
             |         ^
          364|         _module = checked (config._module);