diff --git a/nixos/doc/manual/default.nix b/nixos/doc/manual/default.nix
index aaa6e0da545f..faae4f205443 100644
--- a/nixos/doc/manual/default.nix
+++ b/nixos/doc/manual/default.nix
@@ -252,7 +252,7 @@ in rec {
     ''; # */
 
   # Generate the NixOS manual.
-  manual = runCommand "nixos-manual"
+  manualHTML = runCommand "nixos-manual-html"
     { inherit sources;
       nativeBuildInputs = [ buildPackages.libxml2.bin buildPackages.libxslt.bin ];
       meta.description = "The NixOS manual in HTML format";
@@ -281,6 +281,11 @@ in rec {
       echo "doc manual $dst" >> $out/nix-support/hydra-build-products
     ''; # */
 
+  # Alias for backward compatibility. TODO(@oxij): remove eventually.
+  manual = manualHTML;
+
+  # Index page of the NixOS manual.
+  manualHTMLIndex = "${manualHTML}/share/doc/nixos/index.html";
 
   manualEpub = runCommand "nixos-manual-epub"
     { inherit sources;
diff --git a/nixos/doc/manual/development/building-parts.xml b/nixos/doc/manual/development/building-parts.xml
index eaffc0ef47c2..b4791b72970f 100644
--- a/nixos/doc/manual/development/building-parts.xml
+++ b/nixos/doc/manual/development/building-parts.xml
@@ -34,7 +34,7 @@ $ nix-build -A system</screen>
    </varlistentry>
    <varlistentry>
     <term>
-     <varname>system.build.manual.manual</varname>
+     <varname>system.build.manual.manualHTML</varname>
     </term>
     <listitem>
      <para>
diff --git a/nixos/modules/installer/cd-dvd/installation-cd-graphical-kde.nix b/nixos/modules/installer/cd-dvd/installation-cd-graphical-kde.nix
index f71ed46c7e9e..1c3c9cb30b41 100644
--- a/nixos/modules/installer/cd-dvd/installation-cd-graphical-kde.nix
+++ b/nixos/modules/installer/cd-dvd/installation-cd-graphical-kde.nix
@@ -30,7 +30,7 @@ with lib;
       Version=1.0
       Type=Application
       Name=NixOS Manual
-      Exec=firefox ${config.system.build.manual.manual}/share/doc/nixos/index.html
+      Exec=firefox ${config.system.build.manual.manualHTMLIndex}
       Icon=text-html
     '';
 
diff --git a/nixos/modules/services/misc/nixos-manual.nix b/nixos/modules/services/misc/nixos-manual.nix
index 993b59590bb0..37705e2a889c 100644
--- a/nixos/modules/services/misc/nixos-manual.nix
+++ b/nixos/modules/services/misc/nixos-manual.nix
@@ -39,8 +39,6 @@ let
       in scrubbedEval.options;
   };
 
-  entry = "${manual.manual}/share/doc/nixos/index.html";
-
   helpScript = pkgs.writeScriptBin "nixos-help"
     ''
       #! ${pkgs.runtimeShell} -e
@@ -61,7 +59,7 @@ let
           fi
         fi
       fi
-      exec "$browser" ${entry}
+      exec "$browser" ${manual.manualHTMLIndex}
     '';
 
   desktopItem = pkgs.makeDesktopItem {
@@ -121,7 +119,7 @@ in
     environment.systemPackages = []
       ++ optionals config.services.xserver.enable [ desktopItem pkgs.nixos-icons ]
       ++ optional  config.documentation.man.enable manual.manpages
-      ++ optionals config.documentation.doc.enable [ manual.manual helpScript ];
+      ++ optionals config.documentation.doc.enable [ manual.manualHTML helpScript ];
 
     boot.extraTTYs = mkIf cfg.showManual ["tty${toString cfg.ttyNumber}"];
 
@@ -130,7 +128,7 @@ in
         { description = "NixOS Manual";
           wantedBy = [ "multi-user.target" ];
           serviceConfig =
-            { ExecStart = "${cfg.browser} ${entry}";
+            { ExecStart = "${cfg.browser} ${manual.manualHTMLIndex}";
               StandardInput = "tty";
               StandardOutput = "tty";
               TTYPath = "/dev/tty${toString cfg.ttyNumber}";
diff --git a/nixos/release.nix b/nixos/release.nix
index 14983edb0ce7..cce2c54f02bf 100644
--- a/nixos/release.nix
+++ b/nixos/release.nix
@@ -128,7 +128,8 @@ in rec {
 
   channel = import lib/make-channel.nix { inherit pkgs nixpkgs version versionSuffix; };
 
-  manual = buildFromConfig ({ ... }: { }) (config: config.system.build.manual.manual);
+  manualHTML = buildFromConfig ({ ... }: { }) (config: config.system.build.manual.manualHTML);
+  manual = manualHTML; # TODO(@oxij): remove eventually
   manualEpub = (buildFromConfig ({ ... }: { }) (config: config.system.build.manual.manualEpub));
   manpages = buildFromConfig ({ ... }: { }) (config: config.system.build.manual.manpages);
   manualGeneratedSources = buildFromConfig ({ ... }: { }) (config: config.system.build.manual.generatedSources);