diff --git a/pkgs/tools/typesetting/biber/default.nix b/pkgs/tools/typesetting/biber/default.nix
index 024f25dd1fb..8136266fbab 100644
--- a/pkgs/tools/typesetting/biber/default.nix
+++ b/pkgs/tools/typesetting/biber/default.nix
@@ -2,20 +2,6 @@
 
 let
   biberSource = lib.head (builtins.filter (p: p.tlType == "source") texlive.biber.pkgs);
-
-  # perl 5.32.0 ships with U:C 1.27
-  UnicodeCollate_1_29 = perlPackages.buildPerlPackage rec {
-    pname = "Unicode-Collate";
-    version = "1.29";
-    src = fetchurl {
-      url = "mirror://cpan/authors/id/S/SA/SADAHIRO/${pname}-${version}.tar.gz";
-      sha256 = "0dr4k10fgbsczh4sz7w8d0nnba38r6jrg87cm3gw4xxgn55fzj7l";
-    };
-    meta = {
-      description = "Unicode Collation Algorithm";
-      license = perlPackages.perl.meta.license;
-    };
-  };
 in
 
 perlPackages.buildPerlModule {
@@ -30,7 +16,7 @@ perlPackages.buildPerlModule {
     DateTime DateTimeFormatBuilder DateTimeCalendarJulian
     ExtUtilsLibBuilder FileSlurper FileWhich IPCRun3 LogLog4perl LWPProtocolHttps ListAllUtils
     ListMoreUtils MozillaCA ParseRecDescent IOString ReadonlyXS RegexpCommon TextBibTeX
-    UnicodeCollate_1_29 UnicodeLineBreak URI XMLLibXMLSimple XMLLibXSLT XMLWriter
+    UnicodeLineBreak URI XMLLibXMLSimple XMLLibXSLT XMLWriter
     ClassAccessor TextCSV TextCSV_XS TextRoman DataUniqid LinguaTranslit SortKey
     TestDifferences
     PerlIOutf8_strict