Format .nix files

... with nixfmt (rfc style)

tests/nixos/functional/common.nix

@@ -2,9 +2,11 @@
 
 let
   # FIXME (roberth) reference issue
-  inputDerivation = pkg: (pkg.overrideAttrs (o: {
-    disallowedReferences = [ ];
-  })).inputDerivation;
+  inputDerivation =
+    pkg:
+    (pkg.overrideAttrs (o: {
+      disallowedReferences = [ ];
+    })).inputDerivation;
 
 in
 {
@@ -12,59 +14,63 @@ in
   # we skip it to save time.
   skipTypeCheck = true;
 
-  nodes.machine = { config, pkgs, ... }: {
+  nodes.machine =
+    { config, pkgs, ... }:
+    {
 
-    virtualisation.writableStore = true;
-    system.extraDependencies = [
-      (inputDerivation config.nix.package)
-    ];
+      virtualisation.writableStore = true;
+      system.extraDependencies = [
+        (inputDerivation config.nix.package)
+      ];
 
-    nix.settings.substituters = lib.mkForce [];
+      nix.settings.substituters = lib.mkForce [ ];
 
-    environment.systemPackages = let
-      run-test-suite = pkgs.writeShellApplication {
-        name = "run-test-suite";
-        runtimeInputs = [
-          pkgs.meson
-          pkgs.ninja
-          pkgs.jq
+      environment.systemPackages =
+        let
+          run-test-suite = pkgs.writeShellApplication {
+            name = "run-test-suite";
+            runtimeInputs = [
+              pkgs.meson
+              pkgs.ninja
+              pkgs.jq
+              pkgs.git
+
+              # Want to avoid `/run/current-system/sw/bin/bash` because we
+              # want a store path. Likewise for coreutils.
+              pkgs.bash
+              pkgs.coreutils
+            ];
+            text = ''
+              set -x
+
+              cat /proc/sys/fs/file-max
+              ulimit -Hn
+              ulimit -Sn
+
+              cd ~
+
+              cp -r ${pkgs.nixComponents.nix-functional-tests.src} nix
+              chmod -R +w nix
+
+              chmod u+w nix/.version
+              echo ${pkgs.nixComponents.version} > nix/.version
+
+              export isTestOnNixOS=1
+
+              export NIX_REMOTE_=daemon
+              export NIX_REMOTE=daemon
+
+              export NIX_STORE=${builtins.storeDir}
+
+              meson setup nix/tests/functional build
+              cd build
+              meson test -j1 --print-errorlogs
+            '';
+          };
+        in
+        [
+          run-test-suite
           pkgs.git
-
-          # Want to avoid `/run/current-system/sw/bin/bash` because we
-          # want a store path. Likewise for coreutils.
-          pkgs.bash
-          pkgs.coreutils
         ];
-        text = ''
-          set -x
-
-          cat /proc/sys/fs/file-max
-          ulimit -Hn
-          ulimit -Sn
-
-          cd ~
-
-          cp -r ${pkgs.nixComponents.nix-functional-tests.src} nix
-          chmod -R +w nix
-
-          chmod u+w nix/.version
-          echo ${pkgs.nixComponents.version} > nix/.version
-
-          export isTestOnNixOS=1
-
-          export NIX_REMOTE_=daemon
-          export NIX_REMOTE=daemon
-
-          export NIX_STORE=${builtins.storeDir}
-
-          meson setup nix/tests/functional build
-          cd build
-          meson test -j1 --print-errorlogs
-        '';
-      };
-    in [
-      run-test-suite
-      pkgs.git
-    ];
-  };
+    };
 }