ONLYOFFICE

ONLYOFFICE is a software suite that offers online and offline tools for document editing, collaboration, and management. It is developed by Ascensio System SIA, a company based in Riga, Latvia. ONLYOFFICE consists of several components, such as Docs, Workspace, Desktop Editors, and Mobile Apps. It is an open-source project that aims to provide a secure and compatible alternative to other office suites.

Installation

Add following line to your configuration to enable ONLYOFFICE

❄︎ /etc/nixos/configuration.nix

environment.systemPackages = [ pkgs.onlyoffice-desktopeditors ];

Install missing corefonts

By default, NixOS doesn't ship with any of the Microsoft fonts OOTB, to get the Microsoft corefonts, add the following to your NixOS config:

❄︎ /etc/nixos/configuration.nix

# Allow installation of unfree corefonts package
nixpkgs.config.allowUnfreePredicate = pkg:
  builtins.elem (lib.getName pkg) [ "corefonts" ];

fonts.fonts = with pkgs; [
  corefonts
];

Troubleshooting

OnlyOffice can't see or use any system fonts

According to one upstream bug ONLYOFFICE DesktopEditors is unable to locate font files on NixOS.

Currently, the best workaround to first apply the fix mentioned in Fixes for non-Nix applications#Flatpak, Distrobox, Appimage and other non-Nix applications can't find system fonts/icons/themes, then, as ONLYOFFICE DeskopEditors is currently packaged with FHSEnv and bwrap as of NixOS 26.05, pass the /usr/share/fonts directory inside the bubblewrap/FHSEnv sandbox:

# onlyoffice-font-fix.nix

{ config, pkgs, ... }:

{
  # Expose installed fonts under /run/current-system/sw/share/X11/fonts
  fonts.fontDir.enable = true;

  # OnlyOffice font fix
  nixpkgs.overlays = [
    (final: prev: {
      onlyoffice-desktopeditors = prev.buildFHSEnv (
        prev.onlyoffice-desktopeditors.passthru.args
        // {
          extraBwrapArgs = (prev.onlyoffice-desktopeditors.passthru.args.extraBwrapArgs or [ ]) ++ [
            # Bind mount host system fonts into the FHS container's /usr/share/fonts:
            "--ro-bind"
            "/usr/share/fonts"
            "/usr/share/fonts"
          ];
        }
      );
    })
  ];
}

Another workaround is to install missing or additional fonts and copy them to the user directory

❄︎ /etc/nixos/configuration.nix

# Allow installation of unfree corefonts package
nixpkgs.config.allowUnfreePredicate = pkg:
  builtins.elem (lib.getName pkg) [ "corefonts" ];

fonts.fonts = with pkgs; [
  corefonts
];

$ mkdir -p ~/.local/share/fonts
$ # Query store path to the corefonts package
$ NIXPKGS_ALLOW_UNFREE=1 nix-store --query --outputs $(nix-instantiate '<nixpkgs>' -A corefonts)
$ # Change the store path according to result of the command above
$ cp /nix/store/ssw7d3cl2dzps6y1c88c01xclsigmjqf-corefonts-1/share/fonts/truetype/* ~/.local/share/fonts/
$ chmod 644 ~/.local/share/fonts/*

Installation

Install missing corefonts

Troubleshooting

OnlyOffice can't see or use any system fonts

See also