numtide
Question: Is it possible to share inputs through a pulic blueprint flake
I have problems sharing a flake publicly and I'm not sure if I misunderstood the concept or if it's a bug. I have a public flake like nixos-and-darwin-shared-homes that defines in the flake nix an additional input:
nix-index-database = {
url = "github:nix-community/nix-index-database";
inputs.nixpkgs.follows = "nixpkgs";
};
And a module that sets it up my-nix-index:
{ inputs, ... }: {
imports = [
inputs.nix-index-database.hmModules.nix-index
];
# more config here
}
When pulling this public flake into my private flake:
my-public-flake = {
url = "git+file:///home/user/my-public-flake";
inputs.nixpkgs.follows = "nixpkgs";
};
and pulling it into one of my configurations:
{ inputs, ... }: {
import = [
inputs.my-public-flake.homeModules.my-nix-index
]
}
a nix flake check on this private repo will fail with:
error: attribute 'nix-index-database' missing
at /nix/store/yxndvw7rnr3l7vbchrvlv0fblch05b42-source/modules/home/my-nix-index/default.nix:5:15:
4| {
5| imports = [ inputs.nix-index-database.hmModules.nix-index ];
How do I import a flake in my public flake so that is usable in a private one?
It should work.
Can you give me the output of nix flake show of your public flake?
Hi @zimbatm ... thx for your support! I reduced the example, the public flake is the one here: https://github.com/gaerfield/nixos-modules The command fails on the current commit because of stylix (I'm currently experimenting with it). But the commit b8a5499 does not yet contain stylix and lists the following:
╰─ nix flake show
git+file:///home/user/nixos-modules?rev=b8a549956c41a2ebde6b35ffc293d66a14117b3a
├───__functor: unknown
├───checks
│ ├───aarch64-darwin
│ │ └───pkgs-formatter omitted (use '--all-systems' to show)
│ ├───aarch64-linux
│ │ └───pkgs-formatter omitted (use '--all-systems' to show)
│ ├───x86_64-darwin
│ │ └───pkgs-formatter omitted (use '--all-systems' to show)
│ └───x86_64-linux
│ ├───nixos-vm: derivation 'nixos-system-nixos-25.11.20250624.30a61f0'
│ └───pkgs-formatter: derivation 'treefmt'
├───darwinConfigurations: unknown
├───darwinModules: unknown
├───formatter
│ ├───aarch64-darwin omitted (use '--all-systems' to show)
│ ├───aarch64-linux omitted (use '--all-systems' to show)
│ ├───x86_64-darwin omitted (use '--all-systems' to show)
│ └───x86_64-linux: package 'treefmt'
├───homeModules: unknown
├───legacyPackages
│ ├───aarch64-darwin omitted (use '--legacy' to show)
│ ├───aarch64-linux omitted (use '--legacy' to show)
│ ├───x86_64-darwin omitted (use '--legacy' to show)
│ └───x86_64-linux omitted (use '--legacy' to show)
├───lib: unknown
├───modules: unknown
├───nixosConfigurations
│ └───vm: NixOS configuration
├───nixosModules
│ ├───appimage: NixOS module
│ ├───containers: NixOS module
│ ├───gnm: NixOS module
│ ├───gui: NixOS module
│ ├───hardware: NixOS module
│ ├───networking: NixOS module
│ ├───nix: NixOS module
│ ├───os: NixOS module
│ └───virtualisation: NixOS module
├───packages
│ ├───aarch64-darwin
│ │ └───formatter omitted (use '--all-systems' to show)
│ ├───aarch64-linux
│ │ └───formatter omitted (use '--all-systems' to show)
│ ├───x86_64-darwin
│ │ └───formatter omitted (use '--all-systems' to show)
│ └───x86_64-linux
│ └───formatter: package 'treefmt'
├───systemConfigs: unknown
└───templates
The problematic configuration is in nix.nix (awkward name, I know).
And the output of nix flake show on my private flake:
╰─ nix flake show
warning: Git tree '/home/user/nixos-config' is dirty
git+file:///home/blaschke/nixos-config
├───__functor: unknown
├───checks
│ └───x86_64-linux
error:
… while calling the 'head' builtin
at /nix/store/h2bn031b0fj0ymv9v7bv5rcdjx58y2l9-source/lib/attrsets.nix:1534:13:
1533| if length values == 1 || pred here (elemAt values 1) (head values) then
1534| head values
| ^
1535| else
… while evaluating the attribute 'value'
at /nix/store/h2bn031b0fj0ymv9v7bv5rcdjx58y2l9-source/lib/modules.nix:1086:7:
1085| // {
1086| value = addErrorContext "while evaluating the option `${showOption loc}':" value;
| ^
1087| inherit (res.defsFinal') highestPrio;
… while evaluating the option `system.build.toplevel':
… while evaluating definitions from `/nix/store/h2bn031b0fj0ymv9v7bv5rcdjx58y2l9-source/nixos/modules/system/activation/top-level.nix':
… while evaluating the option `assertions':
… while evaluating definitions from `/nix/store/kdb4bks7yxcgh2nyyjmpm2x8zpb56ifn-source/nixos/common.nix':
(stack trace truncated; use '--show-trace' to show the full, detailed trace)
error: attribute 'nix-index-database' missing
at /nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/base/nix.nix:12:5:
11| imports = [
12| inputs.nix-index-database.hmModules.nix-index
| ^
13| ];
Interestingly nix flake show lists homeModules as unknown. When using nix repl they got listed:
╰─ nix repl
Nix 2.28.4
Type :? for help.
nix-repl> :lf .
Added 27 variables.
nix-repl> homeModules
{
base = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/base";
chromium = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/chromium";
cloud = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/cloud";
firefox = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/firefox";
git = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/git";
gnome = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/gnome";
java-development = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/java-development";
shell = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/shell";
terminal = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/terminal";
track-working-day = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/track-working-day";
virtualisation = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/virtualisation";
vscode = "/nix/store/0wwhvbpgwf4j9x9b64y93mvdlmz3gl87-source/modules/home/vscode";
}
It should work.
Can you give me the output of
nix flake showof your public flake?
@zimbatm I got curious and tried a minimum reproducing example:
- https://github.com/gaerfield/blueprint-120-public
- https://github.com/gaerfield/blueprint-120-consumer
And I wasn't able to reproduce this there. What have I messed up in my repo? Anyway, I'm going to close this issue. No need to invest time in this further. I will give an update as soon as I have identified the root cause in my config.