diff --git a/pkgs/applications/window-managers/jwm/default.nix b/pkgs/applications/window-managers/jwm/default.nix
index a307f359dd94..7a034b8ea642 100644
--- a/pkgs/applications/window-managers/jwm/default.nix
+++ b/pkgs/applications/window-managers/jwm/default.nix
@@ -66,6 +66,10 @@ stdenv.mkDerivation rec {
     xorgproto
   ];
 
+  postPatch = ''
+    sed -i '/AM_ICONV/i AC_CONFIG_MACRO_DIRS([m4])' configure.ac
+  '';
+
   preConfigure = "NOCONFIGURE=1 ./autogen.sh";
 
   enableParallelBuilding = true;