diff --git a/pkgs/development/libraries/gtksourceview-sharp/default.nix b/pkgs/development/libraries/gtksourceview-sharp/default.nix
index 381170584884..3645a982db9f 100644
--- a/pkgs/development/libraries/gtksourceview-sharp/default.nix
+++ b/pkgs/development/libraries/gtksourceview-sharp/default.nix
@@ -1,13 +1,10 @@
 {stdenv, fetchurl, pkgconfig, mono, gtksharp, gtksourceview, monoDLLFixer}:
 
 stdenv.mkDerivation {
-  name = "gtksourceview-sharp-0.5";
+  name = "gtksourceview-sharp-0.6-pre40261";
 
   builder = ./builder.sh;
-  src = fetchurl {
-    url = http://www.go-mono.com/archive/1.0/gtksourceview-sharp-0.5.tar.gz;
-    md5 = "b82e767e42a542e185a534048db3078d";
-  };
+  src = /home/eelco/gtksourceview-sharp-0.6-pre40261.tar.bz2;
 
   patches = [ ./prefix.patch ];
 
diff --git a/pkgs/development/libraries/gtksourceview-sharp/prefix.patch b/pkgs/development/libraries/gtksourceview-sharp/prefix.patch
new file mode 100644
index 000000000000..b1b692063445
--- /dev/null
+++ b/pkgs/development/libraries/gtksourceview-sharp/prefix.patch
@@ -0,0 +1,46 @@
+diff -rc gtksourceview-sharp/gtksourceview/Makefile.in gtksourceview-sharp-new/gtksourceview/Makefile.in
+*** gtksourceview-sharp/gtksourceview/Makefile.in	2005-03-08 18:55:15.000000000 +0100
+--- gtksourceview-sharp-new/gtksourceview/Makefile.in	2005-03-08 18:59:10.000000000 +0100
+***************
+*** 192,198 ****
+  EXTRA_DIST = $(sources) $(customs) Gtk.metadata gtksourceview-api.raw AssemblyInfo.cs.in
+  DISTCLEANFILES = AssemblyInfo.cs
+  noinst_DATA = gtksourceview-sharp.dll
+! apidir = $(gtksharp_prefix)/share/gapi-2.0
+  api_DATA = gtksourceview-api.xml
+  sources = \
+  GtkSourceView.cs
+--- 192,198 ----
+  EXTRA_DIST = $(sources) $(customs) Gtk.metadata gtksourceview-api.raw AssemblyInfo.cs.in
+  DISTCLEANFILES = AssemblyInfo.cs
+  noinst_DATA = gtksourceview-sharp.dll
+! apidir = $(prefix)/share/gapi-2.0
+  api_DATA = gtksourceview-api.xml
+  sources = \
+  GtkSourceView.cs
+Only in gtksourceview-sharp-new/gtksourceview: Makefile.in~
+Only in gtksourceview-sharp-new/gtksourceview: Makefile.in.orig
+Only in gtksourceview-sharp-new/gtksourceview: Makefile.in.rej
+diff -rc gtksourceview-sharp/Makefile.in gtksourceview-sharp-new/Makefile.in
+*** gtksourceview-sharp/Makefile.in	2005-03-08 18:55:16.000000000 +0100
+--- gtksourceview-sharp-new/Makefile.in	2005-03-08 18:59:33.000000000 +0100
+***************
+*** 211,217 ****
+  target_vendor = @target_vendor@
+  SUBDIRS = gtksourceview sample doc 
+  EXTRA_DIST = nemerle.lang vbnet.lang gtksourceview-sharp.pc.in gtk-sharp.snk
+! extra_langdir = $(gtksourceview_prefix)/share/gtksourceview-1.0/language-specs
+  extra_lang_DATA = nemerle.lang vbnet.lang
+  pkgconfigdir = $(libdir)/pkgconfig
+  pkgconfig_DATA = gtksourceview-sharp.pc
+--- 211,217 ----
+  target_vendor = @target_vendor@
+  SUBDIRS = gtksourceview sample doc 
+  EXTRA_DIST = nemerle.lang vbnet.lang gtksourceview-sharp.pc.in gtk-sharp.snk
+! extra_langdir = $(prefix)/share/gtksourceview-1.0/language-specs
+  extra_lang_DATA = nemerle.lang vbnet.lang
+  pkgconfigdir = $(libdir)/pkgconfig
+  pkgconfig_DATA = gtksourceview-sharp.pc
+Only in gtksourceview-sharp-new/: Makefile.in~
+Only in gtksourceview-sharp-new/: Makefile.in.orig
+Only in gtksourceview-sharp-new/: Makefile.in.rej