diff --git a/pkgs/tools/misc/man/default.nix b/pkgs/tools/misc/man/default.nix
index b718e3c1289..9e80cc69179 100644
--- a/pkgs/tools/misc/man/default.nix
+++ b/pkgs/tools/misc/man/default.nix
@@ -19,6 +19,10 @@ stdenv.mkDerivation {
     ./share.patch
   ];
 
+  preConfigure = ''
+    sed 's/^PREPATH=.*/PREPATH=$PATH/' -i configure
+  '';
+
   postInstall =
     ''
       # Use UTF-8 by default.  Otherwise man won't know how to deal