diff --git a/nixos/doc/manual/release-notes/rl-2003.xml b/nixos/doc/manual/release-notes/rl-2003.xml
index 918906d27e7..b629c460f4c 100644
--- a/nixos/doc/manual/release-notes/rl-2003.xml
+++ b/nixos/doc/manual/release-notes/rl-2003.xml
@@ -196,10 +196,10 @@ services.xserver.displayManager.defaultSession = "xfce+icewm";
    </listitem>
    <listitem>
     <para>
-     There is now only one Xfce package-set and module. This means attributes, <literal>xfce4-14</literal>
-     <literal>xfce4-12</literal>, and <literal>xfceUnstable</literal> all now point to the latest Xfce 4.14
-     packages. And in future NixOS releases will be the latest released version of Xfce available at the
-     time during the releases development (if viable).
+     There is now only one Xfce package-set and module. This means that attributes <literal>xfce4-14</literal>
+     and <literal>xfceUnstable</literal> all now point to the latest Xfce 4.14
+     packages. And in the future NixOS releases will be the latest released version of Xfce available at the
+     time of the release's development (if viable).
     </para>
    </listitem>
    <listitem>
diff --git a/pkgs/desktops/xfce/core/xfwm4/default.nix b/pkgs/desktops/xfce/core/xfwm4/default.nix
index 2dff3302617..ed77699f191 100644
--- a/pkgs/desktops/xfce/core/xfwm4/default.nix
+++ b/pkgs/desktops/xfce/core/xfwm4/default.nix
@@ -5,7 +5,7 @@
 mkXfceDerivation {
   category = "xfce";
   pname = "xfwm4";
-  version = "4.14.0";
+  version = "4.14.0"; # TODO: remove xfce4-14 alias when this gets bumped
 
   sha256 = "1z5aqij2d8n9wnha88b0qzkvss54jvqs8w1w5m3mzjl4c9mn9n8m";
 
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index d815983e126..2f29f9cc017 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -522,7 +522,7 @@ mapAliases ({
   morituri = whipper; # added 2018-09-13
   xfceUnstable = xfce4-14; # added 2019-09-17
   xfce4-14 = xfce;
-  xfce4-12 = xfce;
+  xfce4-12 = throw "xfce4-12 has been replaced by xfce4-14"; # added 2020-03-14
   x11 = xlibsWrapper; # added 2015-09
   xbmc = kodi; # added 2018-04-25
   xbmcPlain = kodiPlain; # added 2018-04-25