diff --git a/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/default.nix b/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/default.nix
index 2f9d22e57d89..735dfdb4f81b 100644
--- a/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/default.nix
+++ b/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, substituteAll, fetchurl, fetchpatch, findXMLCatalogs, writeScriptBin, ruby, bash, withManOptDedupPatch ? false }:
+{ lib, stdenv, substituteAll, fetchurl, fetchpatch, findXMLCatalogs, writeScriptBin, ruby, bash }:
 
 let
 
@@ -36,10 +36,6 @@ let
           src = ./catalog-legacy-uris.patch;
           inherit legacySuffix suffix version;
         })
-      ] ++ lib.optionals withManOptDedupPatch [
-        # Fixes https://github.com/NixOS/nixpkgs/issues/166304
-        # https://github.com/docbook/xslt10-stylesheets/pull/241
-        ./fix-man-options-duplication.patch
       ];
 
       propagatedBuildInputs = [ findXMLCatalogs ];
diff --git a/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/fix-man-options-duplication.patch b/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/fix-man-options-duplication.patch
deleted file mode 100644
index 304d9781e6aa..000000000000
--- a/pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/fix-man-options-duplication.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- a/manpages/lists.xsl
-+++ b/manpages/lists.xsl
-@@ -110,7 +110,7 @@
-   <xsl:text>.RE&#10;</xsl:text>
- </xsl:template>
- 
--<xsl:template match="d:varlistentry/d:term"/>
-+<xsl:template match="d:varlistentry/d:term" priority="1"/>
- <xsl:template match="d:glossentry/d:glossterm"/>
- 
- <xsl:template match="d:variablelist[ancestor::d:listitem or ancestor::d:step or ancestor::d:glossdef]|