WIP minimize overlay use

https://discourse.nixos.org/t/installing-only-a-single-package-from-unstable/5598/30

files/nix/raspi-hardware-configuration.nix

@@ -1,9 +1,8 @@
 # source: https://github.com/n8henrie/nixos-btrfs-pi/blob/856722b/nixos/hardware-configuration.nix
 # see https://github.com/NixOS/nixpkgs/blob/master/pkgs/misc/uboot/default.nix as well
-{
-  lib,
-  modulesPath,
-  ...
+{ lib
+, modulesPath
+, ...
 }: {
   imports = [
     (modulesPath + "/installer/scan/not-detected.nix")
@@ -42,7 +41,7 @@
     "/boot/firmware" = {
       device = "/dev/disk/by-label/FIRMWARE";
       fsType = "vfat";
-      options = ["nofail" "noauto"];
+      options = [ "nofail" "noauto" ];
     };
   };
 
@@ -56,6 +55,6 @@
 
   powerManagement.cpuFreqGovernor =
     lib.mkDefault
-    "ondemand";
+      "ondemand";
 }
 

files/nix/run-in-vm.nix

@@ -7,32 +7,32 @@ let
       # = configuration
       (
         { lib, pkgs, ... }:
-{
-  systemd.network.enable = true;
-  systemd.services.sshd.wantedBy = lib.mkForce [ "multi-user.target" ];
+        {
+          systemd.network.enable = true;
+          systemd.services.sshd.wantedBy = lib.mkForce [ "multi-user.target" ];
 
-}
+        }
       )
     ];
   };
 in
 # https://github.com/NixOS/nixpkgs/blob/5061fe0c2c7743370e1d379d6fa60eed26ff1470/pkgs/misc/uboot/default.nix#L230
-# https://github.com/n8henrie/nixos-btrfs-pi/blob/master/flake.nix#L44
+  # https://github.com/n8henrie/nixos-btrfs-pi/blob/master/flake.nix#L44
 nixpkgs.writeScript "run-nixos-vm" ''
-          #!${nixpkgs.runtimeShell}
+            #!${nixpkgs.runtimeShell}
 
-          img=${evaluatedConfig.config.system.build.sdImage}/aarch64-qemu.img
+            img=${evaluatedConfig.config.system.build.sdImage}/aarch64-qemu.img
 
-          # https://wiki.qemu.org/Documentation/Platforms/ARM#Supported_Machines
-	  # https://www.qemu.org/docs/master/system/arm/raspi.html
-          qemu-system-aarch64 \
-            -M raspi2 \
-            -m 1G \
-            -smp 4 \
-            -drive file="$img",format=raw \
-	    -kernel "${nixpkgs.ubootRaspberryPi2}/u-boot-rpi3.bin" \
-            -device usb-net,netdev=net0 \
-            -netdev user,id=net0,hostfwd=tcp::2222-:22 \
-            -append "console=ttyAMA0 root=/dev/mmcblk0p2 rw rootwait" \
-            -nographic
-        ''
+            # https://wiki.qemu.org/Documentation/Platforms/ARM#Supported_Machines
+  	  # https://www.qemu.org/docs/master/system/arm/raspi.html
+            qemu-system-aarch64 \
+              -M raspi2 \
+              -m 1G \
+              -smp 4 \
+              -drive file="$img",format=raw \
+  	    -kernel "${nixpkgs.ubootRaspberryPi2}/u-boot-rpi3.bin" \
+              -device usb-net,netdev=net0 \
+              -netdev user,id=net0,hostfwd=tcp::2222-:22 \
+              -append "console=ttyAMA0 root=/dev/mmcblk0p2 rw rootwait" \
+              -nographic
+''