[BUG] Failed to build nvim-dap (duplicated helper "before" tag)

[mugiwarix]

Field	Description
Plugin	nvim-dap
Nixpkgs	unstable
Home Manager	unstable

• I have read the FAQ and my bug is not listed there.

Description

Enabling the nvim-dap plugin with programs.nixvim.plugins.dap.enable=true; produces the following error when building the nixos configuration:

sudo nixos-rebuild test --show-trace --option eval-cache false
warning: Git tree '/home/[REDACTED]/.nixos-config' is dirty
building the system configuration...
warning: Git tree '/home/[REDACTED]/.nixos-config' is dirty
error: builder for '/nix/store/[REDACTED]-vimplugin-plugin-pack.drv' failed with exit code 1;
       last 10 log lines:
       > Sourcing vim-command-check-hook.sh
       > Using vimCommandCheckHook
       > Sourcing vim-gen-doc-hook
       > Sourcing neovim-require-check-hook.sh
       > Using neovimRequireCheckHook
       > created 854 symlinks in user environment
       > Executing vimPluginGenTags
       > Building help tags
       > Error detected while processing command line:
       > E154: Duplicate tag "before" in file /nix/store/[REDACTED]-vimplugin-plugin-pack/./doc/mini-cursorword.txtFailed to build help tags!
       For full logs, run 'nix log /nix/store/[REDACTED]-vimplugin-plugin-pack.drv'.
error: 1 dependencies of derivation '/nix/store/[REDACTED]-neovim-0.10.2.drv' failed to build
error: 1 dependencies of derivation '/nix/store/[REDACTED]-home-manager-path.drv' failed to build
error: 1 dependencies of derivation '/nix/store/[REDACTED]-home-manager-generation.drv' failed to build
error: 1 dependencies of derivation '/nix/store/[REDACTED]-user-environment.drv' failed to build
error: 1 dependencies of derivation '/nix/store/[REDACTED]-user-environment.drv' failed to build
error: 1 dependencies of derivation '/nix/store/[REDACTED]-etc.drv' failed to build
error: 1 dependencies of derivation '/nix/store/[REDACTED]-etc.drv' failed to build
error: 1 dependencies of derivation '/nix/store/[REDACTED]-nixos-system-[REDACTED]-24.11.20241111.dc460ec.drv' failed to build

In the full log I have also this warning, I don't know if it is relevant for the bug:

warning: The interpretation of store paths arguments ending in `.drv` recently changed. If this command is now failing try again with '/nix/store/[REDACTED]-vimplugin-plugin-pack.drv^*'

Minimal, Reproducible Example (MRE)

Just enable the nvim-dap plugin with programs.nixvim.plugins.dap.enable=true;. The nixpkg channel is unstable and the nixvim version is the following:

"nixvim": {
      "inputs": {
        "devshell": "devshell",
        "flake-compat": "flake-compat_3",
        "flake-parts": "flake-parts",
        "git-hooks": "git-hooks",
        "home-manager": "home-manager_2",
        "nix-darwin": "nix-darwin",
        "nixpkgs": [
          "nixpkgs"
        ],
        "nuschtosSearch": "nuschtosSearch",
        "treefmt-nix": "treefmt-nix"
      },
      "locked": {
        "lastModified": 1731707185,
        "narHash": "sha256-IfA3x0eL4Be/7hvdvGSnT8fgiXz7GL3PtjGw3BH68gM=",
        "owner": "nix-community",
        "repo": "nixvim",
        "rev": "be455f7f2714ce3479ae5bb662a03bd450f45793",
        "type": "github"
      },
      "original": {
        "owner": "nix-community",
        "repo": "nixvim",
        "type": "github"
      }
    },

[lnrds]

I had the same issue and it was related to the experimental option performance.combinePlugins.
nvim-dap and mini.nvim have a duplicated tag so one of them needs to be listed in the performance.combinePlugins.standalonePlugins option.
I don't know if listing one or the other gives better performance but it shouldn't be enough to be noticed.

[khaneliman]

If anyone comes across plugins like this that need to be isolated, it might be worth adding a warning to the plugin's documentation about potential conflicts with combinePlugins.

[mugiwarix]

Sorry for the late reply, disabling the combinePlugins did the job. Should we suggest to the developers to add a warning?