nixos/lib: factor out common system packages

nixos/lib/system.nix

@@ -1,4 +1,4 @@
-{ config, ... }:
+{ config, pkgs, ... }:
 
 {
   # Console configuration.
@@ -18,6 +18,33 @@
     # Assume all NixOS machines are headless.
     # TODO: factor out if I ever switch my desktop.
     noXlibs = true;
+
+    # Packages which should be installed on every machine.
+    systemPackages = with pkgs; [
+      byobu
+      dmidecode
+      ethtool
+      gcc
+      go
+      git
+      htop
+      iftop
+      iperf3
+      jq
+      lm_sensors
+      lshw
+      ndisc6
+      neofetch
+      nethogs
+      nixfmt
+      nmap
+      pciutils
+      tcpdump
+      tmux
+      usbutils
+      wget
+      wireguard-tools
+    ];
   };
 
   system = {

nixos/routnerr-2/configuration.nix

@@ -61,36 +61,13 @@ in {
     };
   };
 
-  # List packages installed in system profile. To search, run:
-  # $ nix search wget
+  # Packages specific to this machine. The base package set is defined in
+  # lib/system.nix.
   environment.systemPackages = with pkgs; [
     # Stable packages.
     bind
-    byobu
     cbfstool
-    dmidecode
-    ethtool
     flashrom
-    gcc
-    go
-    git
-    htop
-    iftop
-    iperf3
-    jq
-    lm_sensors
-    lshw
-    ndisc6
-    neofetch
-    nethogs
-    nixfmt
-    nmap
-    pciutils
-    tcpdump
-    tmux
-    usbutils
-    wget
-    wireguard-tools
 
     # Unstable packages.
     unstable.corerad

nixos/servnerr-3/configuration.nix

@@ -48,21 +48,9 @@
   # Allow the use of Plex.
   nixpkgs.config.allowUnfree = true;
 
-  # List packages installed in system profile. To search, run:
-  # $ nix search wget
-  environment.systemPackages = with pkgs; [
-    byobu
-    git
-    htop
-    jq
-    lm_sensors
-    lshw
-    nixfmt
-    screenfetch
-    tmux
-    wget
-    zfs
-  ];
+  # Packages specific to this machine. The base package set is defined in
+  # lib/system.nix.
+  environment.systemPackages = with pkgs; [ zfs ];
 
   nix = {
     # Automatic Nix GC.