diff --git a/pkgs/tools/package-management/apt/default.nix b/pkgs/tools/package-management/apt/default.nix
index b2d5e96f391c..7139454733a8 100644
--- a/pkgs/tools/package-management/apt/default.nix
+++ b/pkgs/tools/package-management/apt/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
   ];
 
   preConfigure = ''
-    export PERL5LIB="$PERL5LIB''${PERL5LIB:+:}${Po4a}/lib/perl5";
+    export PERL5LIB="$PERL5LIB''${PERL5LIB:+:}${Po4a}/lib/perl5/site_perl";
 
     cmakeFlagsArray+=(
       -DBERKELEY_DB_INCLUDE_DIRS=${db.dev}/include