Added some things, and then removed things until the build worked. Not a fan, NixOS.

configuration.nix

@@ -24,6 +24,7 @@
   # $ nix search example
   environment.systemPackages = with pkgs; [
   #  vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
+    # amarok # music player - that is so far from intuitive i *could not start a track playing at all*
     annotator # image annotation, KDE's Spectacle does too but only for screenshots it just took, maybe ksnip or shutter would be more flexible screenshot tools, hmm kdePackages.kquickimageedit and kdePackages.kimageannotator basically use the same tools as Spectacle, i'll try them too.
     ansible
     authenticator # 2-factor auth, it's for Gnome but it's the only good one (can scan in from the phone etc)
@@ -50,6 +51,7 @@
     fish
     fishPlugins.done
     fira-mono # coding font WITHOUT ligatures, thank god
+    firefox
     firefoxpwa
     floorp
     fsearch
@@ -68,7 +70,7 @@
     hunspellDicts.es_MX
     inetutils # telnet among other things
     # jitsi # - this is unusuable with a regular Jitsi Meet server like May First?
-    # jitsi-meet-electron # currently breaks build
+    jitsi-meet-electron # currently breaks build
     jq
     just
     kdePackages.audex
@@ -94,7 +96,7 @@
     kirc
     # kiwix
     # kiwix-tools
-    kupfer # a nice launcher, installed because my main desktop screen is broken and i needed a way to see what apps i was picking
+    # kupfer # a nice launcher, installed because my main desktop screen is broken and i needed a way to see what apps i was picking - not used it much since though, so uninstalling
     libinput
     libreoffice-qt6-still # this is basically unusable, graphics all mis-aligned
     # light
@@ -134,7 +136,8 @@
     poppins
     postgresql
     qrscan
-    radiotray-ng # Prefer shortwave for real radio
+    # quick-lookup
+    # radiotray-ng # Prefer shortwave for real radio  # breaking build
     recoll
     repren
     reveal-md
@@ -151,7 +154,7 @@
     sly # simple image editing
     spideroak # backups
     starship # fancy command line prompt
-    strawberry-qt6
+    # strawberry-qt6 # oh no, breaks build with a libgpod fail.
     system-config-printer
     tdf # Terminal PDF viewer
     textpieces
@@ -326,7 +329,7 @@
     description = "mlncn";
     extraGroups = [ "networkmanager" "wheel" "docker" "scanner" "lp" ];
     packages = with pkgs; [
-      discord
+      # discord # trash as is predictable, but damn it is hard to get Nix to say what the damn problem is, --show-trace on the rebuild is the only way because i can only get nix why-depends
       kdePackages.kate
       logseq
     ];
@@ -350,7 +353,8 @@
 
 
   # Install firefox.
-  programs.firefox.enable = true;
+  # Going with the main packages version instead
+  # programs.firefox.enable = true; # Going with the main packages version instead because this version cannot screenshare and seems to tend to be a minor point version behind anyway https://discourse.nixos.org/t/screen-sharing-with-wayland-gnome/12449/8
   programs.firefox.nativeMessagingHosts.packages = [ pkgs.firefoxpwa ];
   programs.fish.enable = true;
   programs.bash = {
@@ -362,6 +366,9 @@
       fi
     '';
   };
+  # Support AppImages
+  # programs.appimage.enable = true;
+  # programs.appimage.binfmt = true;
 
   # Allow unfree packages
   nixpkgs.config.allowUnfree = true;