Set `ssh_command` in borgmatic settings

asqiir · September 5, 2026, 9:09pm

I want to set the [ssh_command](borgmatic - ⚙️ Configuration) in borgmatic.

For all I can tell, this option is not possible to set via any of the borgmatic options exposed to home-manager.

What am I missing?

dtannock · September 6, 2026, 3:32am

It looks like all extraConfig options are passed verbatim to the config file.

github.com/nix-community/home-manager

modules/programs/borgmatic.nix

fd0956c99


      
          removeNullValues = attrSet: lib.filterAttrs (_key: value: value != null) attrSet;
          
          hmFiles = builtins.attrValues config.home.file;
          hmSymlinks = (lib.filter (file: !file.recursive) hmFiles);
          hmExcludePattern = file: ''
            ${config.home.homeDirectory}/${file.target}
          '';
          hmExcludePatterns = lib.concatMapStrings hmExcludePattern hmSymlinks;
          hmExcludeFile = pkgs.writeText "hm-symlinks.txt" hmExcludePatterns;
          
          writeConfig =
            config:
            lib.generators.toYAML { } (
              removeNullValues (
                {
                  source_directories = config.location.sourceDirectories;
                  inherit (config.location) patterns repositories;
                  inherit (config.consistency) checks;
                  encryption_passcommand = config.storage.encryptionPasscommand;
                  keep_within = config.retention.keepWithin;
                  keep_secondly = config.retention.keepSecondly;

I wonder if using any of them works:

{
  programs.borgmatic.backups.thenameofyourbackup.location.extraConfig = {
    ssh_command = "ssh -i /path/to/private/key";
  };
}