fix: add gc and misc settings to neon as well

hosts/argon/configuration.nix

@@ -2,11 +2,12 @@
 
 {
   imports = [
+    ../../modules/nixos/astro.nix
     ../../modules/nixos/audio.nix
     ../../modules/nixos/bootloader.nix
     ../../modules/nixos/calibre.nix
-    ../../modules/nixos/claudecode.nix
     ../../modules/nixos/certificates.nix
+    ../../modules/nixos/claudecode.nix
     ../../modules/nixos/drives.nix
     ../../modules/nixos/gnupg.nix
     ../../modules/nixos/gnuradio.nix
@@ -21,9 +22,8 @@
     ../../modules/nixos/protonvpn.nix
     ../../modules/nixos/services.nix
     ../../modules/nixos/settings.nix
-    ../../modules/nixos/stellarium.nix
-    ../../modules/nixos/thunar.nix
     ../../modules/nixos/steam.nix
+    ../../modules/nixos/thunar.nix
     ../../modules/nixos/users.nix
   ];
 

hosts/neon/configuration.nix

@@ -2,6 +2,7 @@
 
 {
   imports = [
+    ../../modules/nixos/astro.nix
     ../../modules/nixos/audio.nix
     ../../modules/nixos/bootloader.nix
     ../../modules/nixos/certificates.nix
@@ -17,7 +18,6 @@
     ../../modules/nixos/sddm.nix
     ../../modules/nixos/services.nix
     ../../modules/nixos/settings.nix
-    ../../modules/nixos/stellarium.nix
     ../../modules/nixos/steam.nix
     ../../modules/nixos/users.nix
   ];

modules/nixos/astro.nix

@@ -0,0 +1,63 @@
+{ config, lib, pkgs, ... }:
+
+let
+  # Siril's Python plugins (sirilpy) run in a venv that pip-installs foreign
+  # manylinux wheels (numpy, GraXpert deps, ...). Those .so files need
+  # libstdc++ at runtime. nix-ld does NOT cover this: it only handles the
+  # initial exec of a foreign binary, but here a *native* nixpkgs python
+  # dlopen()s the foreign wheel. So we put the libs on LD_LIBRARY_PATH, which
+  # the python subprocess inherits from the Siril process.
+  sirilWithPlugins = pkgs.symlinkJoin {
+    name = "siril-with-plugins";
+    paths = [ pkgs.siril ];
+    nativeBuildInputs = [ pkgs.makeWrapper ];
+    postBuild = ''
+      wrapProgram $out/bin/siril \
+        --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath (with pkgs; [
+          stdenv.cc.cc.lib   # libstdc++ / libgcc_s / libgomp  (numpy etc.)
+          zlib
+          zstd               # libzstd.so.1                     (PyQt6)
+          libGL              # libGL.so.1                       (PyQt6)
+          # PyQt6 (VeraLux) — Qt bundles xcb support so it needs these even
+          # on Wayland; libxkbcommon is the keymap lib used by Wayland too.
+          glib
+          fontconfig
+          freetype
+          dbus
+          libxkbcommon
+          # Qt platform plugins: the wayland plugin (libqwayland.so) needs the
+          # wayland client libs; the xcb fallback needs libxcb-cursor.so.0.
+          wayland            # libwayland-client/cursor/egl       (wayland plugin)
+          libxcb-cursor      # libxcb-cursor.so.0                 (xcb plugin)
+          libx11
+          libxcb
+          libxcb-util
+          libxcb-wm
+          libxcb-image
+          libxcb-keysyms
+          libxcb-render-util
+        ])}
+    '';
+  };
+in
+{
+  # install stellarium for target finding and siril for stacking
+  environment.systemPackages = with pkgs; [
+    stellarium
+    sirilWithPlugins
+  ];
+
+  # StarNet++ has no nixpkgs package. Download the StarNet v2 ORT CLI build
+  # (starnet2_linux_*_ORT_x64_cli) from https://www.starnetastro.com/download/
+  # and unzip it to ~/.local/share/siril/starnet/. Then in Siril set
+  #   Preferences -> Miscellaneous -> StarNet executable
+  # to the extracted ./starnet2 binary.
+  #
+  # The binary is a generic dynamically-linked ELF, so NixOS needs nix-ld to
+  # run it. Its own opencv/onnxruntime libs are found via the bundled ./lib.
+  programs.nix-ld.enable = true;
+  programs.nix-ld.libraries = with pkgs; [
+    stdenv.cc.cc.lib   # libstdc++ / libgcc_s
+    zlib
+  ];
+}

modules/nixos/stellarium.nix

@@ -1,8 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-{
-  # install stellarium for stargazing and sky simulation
-  environment.systemPackages = with pkgs; [
-    stellarium
-  ];
-}