diff --git a/nixos/modules/system/boot/loader/grub/install-grub.pl b/nixos/modules/system/boot/loader/grub/install-grub.pl
index 4d8537d4c327..0c93b288fc65 100644
--- a/nixos/modules/system/boot/loader/grub/install-grub.pl
+++ b/nixos/modules/system/boot/loader/grub/install-grub.pl
@@ -103,10 +103,10 @@ if (stat($bootPath)->dev != stat("/nix/store")->dev) {
 
 # Discover information about the location of the bootPath
 struct(Fs => {
-        device => '$',
-        type => '$',
-        mount => '$',
-    });
+    device => '$',
+    type => '$',
+    mount => '$',
+});
 sub PathInMount {
     my ($path, $mount) = @_;
     my @splitMount = split /\//, $mount;
@@ -155,9 +155,9 @@ sub GetFs {
     return $bestFs;
 }
 struct (Grub => {
-        path => '$',
-        search => '$',
-    });
+    path => '$',
+    search => '$',
+});
 my $driveid = 1;
 sub GrubFs {
     my ($dir) = @_;
@@ -254,8 +254,8 @@ if ($grubVersion == 1) {
     # $defaultEntry might be "saved", indicating that we want to use the last selected configuration as default.
     # Incidentally this is already the correct value for the grub 1 config to achieve this behaviour.
     $conf .= "
-    default $defaultEntry
-    timeout $timeout
+        default $defaultEntry
+        timeout $timeout
     ";
     if ($splashImage) {
         copy $splashImage, "$bootPath/background.xpm.gz" or die "cannot copy $splashImage to $bootPath: $!\n";
@@ -305,7 +305,7 @@ else {
 
     if ($copyKernels == 0) {
         $conf .= "
-        " . $grubStore->search;
+            " . $grubStore->search;
     }
     # FIXME: should use grub-mkconfig.
     my $defaultEntryText = $defaultEntry;
@@ -313,55 +313,55 @@ else {
         $defaultEntryText = "\"\${saved_entry}\"";
     }
     $conf .= "
-    " . $grubBoot->search . "
-    if [ -s \$prefix/grubenv ]; then
-    load_env
-    fi
-
-    # ‘grub-reboot’ sets a one-time saved entry, which we process here and
-    # then delete.
-    if [ \"\${next_entry}\" ]; then
-    set default=\"\${next_entry}\"
-    set next_entry=
-    save_env next_entry
-    set timeout=1
-    set boot_once=true
-    else
-    set default=$defaultEntryText
-    set timeout=$timeout
-    fi
-
-    function savedefault {
-        if [ -z \"\${boot_once}\"]; then
-        saved_entry=\"\${chosen}\"
-        save_env saved_entry
+        " . $grubBoot->search . "
+        if [ -s \$prefix/grubenv ]; then
+          load_env
         fi
-    }
 
-    # Setup the graphics stack for bios and efi systems
-    if [ \"\${grub_platform}\" = \"efi\" ]; then
-    insmod efi_gop
-    insmod efi_uga
-    else
-    insmod vbe
-    fi
+        # ‘grub-reboot’ sets a one-time saved entry, which we process here and
+        # then delete.
+        if [ \"\${next_entry}\" ]; then
+          set default=\"\${next_entry}\"
+          set next_entry=
+          save_env next_entry
+          set timeout=1
+          set boot_once=true
+        else
+          set default=$defaultEntryText
+          set timeout=$timeout
+        fi
+
+        function savedefault {
+            if [ -z \"\${boot_once}\"]; then
+            saved_entry=\"\${chosen}\"
+            save_env saved_entry
+            fi
+        }
+
+        # Setup the graphics stack for bios and efi systems
+        if [ \"\${grub_platform}\" = \"efi\" ]; then
+          insmod efi_gop
+          insmod efi_uga
+        else
+          insmod vbe
+        fi
     ";
 
     if ($font) {
         copy $font, "$bootPath/converted-font.pf2" or die "cannot copy $font to $bootPath: $!\n";
         $conf .= "
-        insmod font
-        if loadfont " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/converted-font.pf2; then
-        insmod gfxterm
-        if [ \"\${grub_platform}\" = \"efi\" ]; then
-        set gfxmode=$gfxmodeEfi
-        set gfxpayload=$gfxpayloadEfi
-        else
-        set gfxmode=$gfxmodeBios
-        set gfxpayload=$gfxpayloadBios
-        fi
-        terminal_output gfxterm
-        fi
+            insmod font
+            if loadfont " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/converted-font.pf2; then
+              insmod gfxterm
+              if [ \"\${grub_platform}\" = \"efi\" ]; then
+                set gfxmode=$gfxmodeEfi
+                set gfxpayload=$gfxpayloadEfi
+              else
+                set gfxmode=$gfxmodeBios
+                set gfxpayload=$gfxpayloadBios
+              fi
+              terminal_output gfxterm
+            fi
         ";
     }
     if ($splashImage) {
@@ -378,14 +378,14 @@ else {
         }
         copy $splashImage, "$bootPath/background$suffix" or die "cannot copy $splashImage to $bootPath: $!\n";
         $conf .= "
-        insmod " . substr($suffix, 1) . "
-        if background_image --mode '$splashMode' " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/background$suffix; then
-        set color_normal=white/black
-        set color_highlight=black/white
-        else
-        set menu_color_normal=cyan/blue
-        set menu_color_highlight=white/blue
-        fi
+            insmod " . substr($suffix, 1) . "
+            if background_image --mode '$splashMode' " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/background$suffix; then
+              set color_normal=white/black
+              set color_highlight=black/white
+            else
+              set menu_color_normal=cyan/blue
+              set menu_color_highlight=white/blue
+            fi
         ";
     }
 
@@ -395,20 +395,20 @@ else {
         # Copy theme
         rcopy($theme, "$bootPath/theme") or die "cannot copy $theme to $bootPath\n";
         $conf .= "
-        # Sets theme.
-        set theme=" . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/theme/theme.txt
-        export theme
-        # Load theme fonts, if any
+            # Sets theme.
+            set theme=" . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/theme/theme.txt
+            export theme
+            # Load theme fonts, if any
         ";
 
         find( { wanted => sub {
-                    if ($_ =~ /\.pf2$/i) {
-                        $font = File::Spec->abs2rel($File::Find::name, $theme);
-                        $conf .= "
-                        loadfont " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/theme/$font
-                        ";
-                    }
-                }, no_chdir => 1 }, $theme );
+            if ($_ =~ /\.pf2$/i) {
+                $font = File::Spec->abs2rel($File::Find::name, $theme);
+                $conf .= "
+                    loadfont " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/theme/$font
+                ";
+            }
+        }, no_chdir => 1 }, $theme );
     }
 }
 
@@ -474,8 +474,8 @@ sub addEntry {
     # FIXME: $confName
 
     my $kernelParams =
-    "init=" . Cwd::abs_path("$path/init") . " " .
-    readFile("$path/kernel-params");
+        "init=" . Cwd::abs_path("$path/init") . " " .
+        readFile("$path/kernel-params");
     my $xenParams = $xen && -e "$path/xen-params" ? readFile("$path/xen-params") : "";
 
     if ($grubVersion == 1) {
@@ -524,9 +524,9 @@ foreach my $link (@links) {
 
     my $date = strftime("%F", localtime(lstat($link)->mtime));
     my $version =
-    -e "$link/nixos-version"
-    ? readFile("$link/nixos-version")
-    : basename((glob(dirname(Cwd::abs_path("$link/kernel")) . "/lib/modules/*"))[0]);
+        -e "$link/nixos-version"
+        ? readFile("$link/nixos-version")
+        : basename((glob(dirname(Cwd::abs_path("$link/kernel")) . "/lib/modules/*"))[0]);
 
     if ($cfgName) {
         $entryName = $cfgName;
@@ -551,8 +551,8 @@ sub addProfile {
     sub nrFromGen { my ($x) = @_; $x =~ /\/\w+-(\d+)-link/; return $1; }
 
     my @links = sort
-    { nrFromGen($b) <=> nrFromGen($a) }
-    (glob "$profile-*-link");
+        { nrFromGen($b) <=> nrFromGen($a) }
+        (glob "$profile-*-link");
 
     my $curEntry = 0;
     foreach my $link (@links) {
@@ -563,9 +563,9 @@ sub addProfile {
         }
         my $date = strftime("%F", localtime(lstat($link)->mtime));
         my $version =
-        -e "$link/nixos-version"
-        ? readFile("$link/nixos-version")
-        : basename((glob(dirname(Cwd::abs_path("$link/kernel")) . "/lib/modules/*"))[0]);
+            -e "$link/nixos-version"
+            ? readFile("$link/nixos-version")
+            : basename((glob(dirname(Cwd::abs_path("$link/kernel")) . "/lib/modules/*"))[0]);
         addEntry("NixOS - Configuration " . nrFromGen($link) . " ($date - $version)", $link);
     }
 
@@ -653,13 +653,13 @@ foreach my $fn (glob "$bootPath/kernels/*") {
 #
 
 struct(GrubState => {
-        name => '$',
-        version => '$',
-        efi => '$',
-        devices => '$',
-        efiMountPoint => '$',
-        extraGrubInstallArgs => '@',
-    });
+    name => '$',
+    version => '$',
+    efi => '$',
+    devices => '$',
+    efiMountPoint => '$',
+    extraGrubInstallArgs => '@',
+});
 # If you add something to the state file, only add it to the end
 # because it is read line-by-line.
 sub readGrubState {