make evremap DRYer

hosts/catbook-j/configuration.nix

@@ -2,26 +2,7 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ config, pkgs, lib, ... }:
-let
-  evremap = pkgs.rustPlatform.buildRustPackage {
-    pname = "evremap";
-    version = "0.1.0";
-    src = pkgs.fetchFromGitHub {
-      owner = "wez";
-      repo = "evremap";
-      rev = "4480c4eda223b98899b0fbd926bc34f7bd0e1a18";
-      sha256 = "sha256-BxSrphgW1n465FX6bKVkq6O0XE2JqanfSYlsGwWUWkQ=";
-    };
-    cargoHash = "";
-    cargoLock.lockFile = ../../other/evremap.Cargo.lock;
-    postPatch = ''
-      cp ${../../other/evremap.Cargo.lock} Cargo.lock
-    '';
-    nativeBuildInputs = [ pkgs.pkg-config ];
-    buildInputs = [ pkgs.libevdev ];
-  };
-in {
+{ config, pkgs, lib, ... }: {
   imports =
     [ # Include the results of the hardware scan.
       ./hardware-configuration.nix
@@ -77,13 +58,6 @@ in {
     "/crypto_keyfile.bin" = null;
   };
 
-  systemd.services = {
-    evremap = {
-      script = "${evremap}/bin/evremap remap ${../../other/remaps-catbook.toml}";
-      wantedBy = ["multi-user.target"];
-    };
-  };
-
   # nixpkgs = {
   #   overlays = [
   #     (self: super: {
@@ -136,6 +110,7 @@ in {
     LC_TELEPHONE = "de_DE.UTF-8";
     LC_TIME = "de_DE.UTF-8";
   };
+
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
   # on your system were taken. It‘s perfectly fine and recommended to leave

hosts/potatobook-g/configuration.nix

@@ -1,23 +1,4 @@
-{ pkgs, ... }:
-let 
-  evremap = pkgs.rustPlatform.buildRustPackage {
-    pname = "evremap";
-    version = "0.1.0";
-    src = pkgs.fetchFromGitHub {
-      owner = "wez";
-      repo = "evremap";
-      rev = "4480c4eda223b98899b0fbd926bc34f7bd0e1a18";
-      sha256 = "sha256-BxSrphgW1n465FX6bKVkq6O0XE2JqanfSYlsGwWUWkQ=";
-    };
-    cargoHash = "";
-    cargoLock.lockFile = ../../other/evremap.Cargo.lock;
-    postPatch = ''
-      cp ${../../other/evremap.Cargo.lock} Cargo.lock
-    '';
-    nativeBuildInputs = [ pkgs.pkg-config ];
-    buildInputs = [ pkgs.libevdev ];
-  };
-in {  
+{ pkgs, ... }: {  
   nix.settings = {
     trusted-substituters = [
       "https://t2linux.cachix.org"
@@ -185,10 +166,6 @@ in {
         fi
       '';
     };
-    evremap = {
-      script = "${evremap}/bin/evremap remap ${../../other/remaps.toml}";
-      wantedBy = ["multi-user.target"];
-    };
   };
 
   services.logind.extraConfig = ''

modules/desktop/default.nix

@@ -26,6 +26,7 @@ in with lib; {
     ./social.nix
     ./mail.nix
     ./specific-hardware
+    ./evremap.nix
     ./xmonad.nix
   ];
 

modules/desktop/evremap.nix

@@ -0,0 +1,25 @@
+{ pkgs, config, ... }: 
+let
+  evremap = pkgs.rustPlatform.buildRustPackage {
+    pname = "evremap";
+    version = "0.1.0";
+    src = pkgs.fetchFromGitHub {
+      owner = "wez";
+      repo = "evremap";
+      rev = "4480c4eda223b98899b0fbd926bc34f7bd0e1a18";
+      sha256 = "sha256-BxSrphgW1n465FX6bKVkq6O0XE2JqanfSYlsGwWUWkQ=";
+    };
+    cargoHash = "";
+    cargoLock.lockFile = ../../other/evremap.Cargo.lock;
+    postPatch = ''
+      cp ${../../other/evremap.Cargo.lock} Cargo.lock
+    '';
+    nativeBuildInputs = [ pkgs.pkg-config ];
+    buildInputs = [ pkgs.libevdev ];
+  };
+in {
+  systemd.services.evremap = {
+    script = "${evremap}/bin/evremap remap ${../../other/remaps-${config.networking.hostName}.toml}";
+    wantedBy = [ "multi-user.target" ];
+  };
+}