diff --git a/pkg-deps.sh b/pkg-deps.sh
index b181215..4a7d753 100755
--- a/pkg-deps.sh
+++ b/pkg-deps.sh
@@ -1,5 +1,8 @@
 #!/bin/sh
 
+# script to generate dependency graph for fedora haskell libraries
+# requires ghc, ghc-*-devel and graphviz to be installed 
+
 set -e
 
 mkdir -p .pkg-deps
@@ -10,9 +13,11 @@ ghc-pkg dot --global > pkgs.dot
 
 cp -p pkgs.dot pkgs.dot.orig
 
-GHC_PKGS="array base-4 base-3 bin-package-db bytestring Cabal containers directory dph extensible-exceptions filepath ghc-6.12 ghc-binary ghc-prim haskell98 hpc integer-gmp old-locale old-time pretty process random syb template-haskell time unix Win32"
+GHC_PKGS="array base-4 base-3 bin-package-db bytestring Cabal containers directory dph extensible-exceptions filepath ghc-6.12 ghc-binary ghc-prim haskell98 hpc integer-gmp old-locale old-time pretty process random syb template-haskell time unix utf8-string-0.3.4 Win32"
 
 # ignore library packages provided by ghc
 for i in $GHC_PKGS; do sed -i -e /$i/d pkgs.dot; done
 
 cat pkgs.dot | tred | dot -Nfontsize=8 -Tsvg >pkgs.svg
+
+xdg-open pkgs.svg