diff --git a/develop/iasl/iasl-20110413-Makefile.patch b/develop/iasl/iasl-20110413-Makefile.patch
deleted file mode 100644
index 16d76dfa1..000000000
--- a/develop/iasl/iasl-20110413-Makefile.patch
+++ /dev/null
@@ -1,49 +0,0 @@
-# --- SDE-COPYRIGHT-NOTE-BEGIN ---
-# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
-#
-# Filename: package/.../iasl/iasl-20110413-Makefile.patch
-# Copyright (C) 2011 The OpenSDE Project
-#
-# More information can be found in the files COPYING and README.
-#
-# This patch file is dual-licensed. It is available under the license the
-# patched project is licensed under, as long as it is an OpenSource license
-# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
-# of the GNU General Public License as published by the Free Software
-# Foundation; either version 2 of the License, or (at your option) any later
-# version.
-# --- SDE-COPYRIGHT-NOTE-END ---
-
---- acpica-unix-20110413/compiler/Makefile.orig	2011-05-14 00:23:37.064002301 +0200
-+++ acpica-unix-20110413/compiler/Makefile	2011-05-14 00:47:05.112002302 +0200
-@@ -67,11 +67,11 @@
- 	asluuid.o \
- 	aslwalks.o \
- 	dtcompile.o \
-+	dtparserparse.o \
-+	dtparserlex.o \
- 	dtexpress.o \
- 	dtfield.o \
- 	dtio.o \
--	dtparserlex.o \
--	dtparserparse.o \
- 	dtsubtable.o \
- 	dttable.o \
- 	dttemplate.o \
-@@ -166,11 +166,14 @@
- 
- INTERMEDIATES = \
- 	aslcompilerlex.c \
--	aslcompilerparse.c
-+	aslcompilerparse.c \
-+	dtparserparse.c
- 
- MISC = \
- 	aslcompiler.y.h \
--	aslcompilerparse.output
-+	aslcompilerparse.output \
-+	dtparser.y.h \
-+	dtparserparse.output
- 
- 
- #
diff --git a/develop/iasl/iasl.conf b/develop/iasl/iasl.conf
index 22966f2ea..4839a8bfb 100644
--- a/develop/iasl/iasl.conf
+++ b/develop/iasl/iasl.conf
@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../iasl/iasl.conf
-# Copyright (C) 2011 The OpenSDE Project
+# Copyright (C) 2011 - 2012 The OpenSDE Project
 #
 # More information can be found in the files COPYING and README.
 #
@@ -12,10 +12,10 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
-makeopt="-C compiler $makeopt"
+makeopt="-C source/compiler $makeopt"
 makeinstopt=
 
 iasl_install() {
-	install -p -D compiler/iasl $root/$bindir/iasl
+	install -p -D source/compiler/iasl $root/$bindir/iasl
 }
 hook_add postmake 9 'iasl_install'
diff --git a/develop/iasl/iasl.desc b/develop/iasl/iasl.desc
index 1eb5a2206..eed4b3ccd 100644
--- a/develop/iasl/iasl.desc
+++ b/develop/iasl/iasl.desc
@@ -2,7 +2,7 @@
 [COPY] This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 [COPY]
 [COPY] Filename: package/.../iasl/iasl.desc
-[COPY] Copyright (C) 2011 The OpenSDE Project
+[COPY] Copyright (C) 2011 - 2012 The OpenSDE Project
 [COPY]
 [COPY] More information can be found in the files COPYING and README.
 [COPY]
@@ -29,7 +29,7 @@
 
 [L] Free-to-use
 [S] Stable
-[V] 20110413
+[V] 20120420
 [P] X -----5---9 179.000
 
-[D] 2719447169 acpica-unix-20110413.tar.gz http://www.acpica.org/download/
+[D] 2166413023 acpica-unix-20120420.tar.gz http://www.acpica.org/download/