diff --git a/system/upx/README b/system/upx/README
new file mode 100644
index 0000000000..b06c7bac41
--- /dev/null
+++ b/system/upx/README
@@ -0,0 +1,6 @@
+UPX achieves an excellent compression ratio and offers very fast 
+decompression. Your executables suffer no memory overhead or other 
+drawbacks for most of the formats supported, because of in-place 
+decompression.
+
+This requires ucl at build-time.
diff --git a/system/upx/slack-desc b/system/upx/slack-desc
new file mode 100644
index 0000000000..27628006a9
--- /dev/null
+++ b/system/upx/slack-desc
@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.  Line
+# up the first '|' above the ':' following the base package name, and the '|'
+# on the right side marks the last column you can put a character in.  You must
+# make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':'.
+
+   |-----handy-ruler------------------------------------------------------|
+upx: upx (Ultimate Packer for eXecutables)
+upx:
+upx: UPX achieves an excellent compression ratio and offers very fast 
+upx: decompression. Your executables suffer no memory overhead or other 
+upx: drawbacks for most of the formats supported, because of in-place 
+upx: decompression. 
+upx:
+upx: Homepage: http://upx.sourceforge.net/
+upx:
+upx:
+upx:
diff --git a/system/upx/upx.SlackBuild b/system/upx/upx.SlackBuild
new file mode 100644
index 0000000000..68fa75a574
--- /dev/null
+++ b/system/upx/upx.SlackBuild
@@ -0,0 +1,81 @@
+#!/bin/sh
+
+# Slackware build script for upx
+
+# Copyright 2010  Binh Nguyen <binhnguyen@fastmail.fm>
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+PRGNAM=upx
+VERSION=${VERSION:-3.07}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i486 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+set -eu
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION-src
+tar xvf $CWD/$PRGNAM-$VERSION-src.tar.bz2
+cd $PRGNAM-$VERSION-src
+chown -R root:root .
+find . \
+ \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
+ -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
+ -exec chmod 644 {} \;
+
+# Extract LZMA SDK to a proper place for use at build-time
+mkdir -p $TMP/lzma465
+tar xvf $CWD/lzma465.tar.bz2 -C $TMP/lzma465
+
+make UPX_LZMA_VERSION=0x465 UPX_LZMADIR=$TMP/lzma465 all
+install -D src/upx.out $PKG/usr/bin/upx
+
+find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+install -D -m 644 doc/upx.1 $PKG/usr/man/man1/upx.1
+find $PKG/usr/man -type f -exec gzip -9 {} \;
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a BUGS COPYING LICENSE NEWS PROJECTS README* THANKS TODO \
+  doc/*.txt doc/upx.pod \
+    $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
diff --git a/system/upx/upx.info b/system/upx/upx.info
new file mode 100644
index 0000000000..2f2cd57489
--- /dev/null
+++ b/system/upx/upx.info
@@ -0,0 +1,12 @@
+PRGNAM="upx"
+VERSION="3.07"
+HOMEPAGE="http://upx.sourceforge.net/"
+DOWNLOAD="http://downloads.sourceforge.net/upx/upx-3.07-src.tar.bz2 \
+          http://downloads.sourceforge.net/sevenzip/lzma465.tar.bz2"
+MD5SUM="8186ab103288242f7e8ecad1acd4af03 \
+        29d5ffd03a5a3e51aef6a74e9eafb759"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+MAINTAINER="Binh Nguyen"
+EMAIL="binhnguyen@fastmail.fm"
+APPROVED="Erik Hanson"