diff --git a/main/isl/APKBUILD b/main/isl/APKBUILD
index 6c252f3b26a8a672569ca450499a4977ee6b6665..ca02e6debb575ca184d284a1a2a6aa4191d14f13 100644
--- a/main/isl/APKBUILD
+++ b/main/isl/APKBUILD
@@ -1,7 +1,7 @@
 # Contributor: Timo Teräs <timo.teras@iki.fi>
 # Maintainer: Timo Teräs <timo.teras@iki.fi>
 pkgname=isl
-pkgver=0.17.1
+pkgver=0.18
 pkgrel=0
 pkgdesc="An Integer Set Library for the Polyhedral Model"
 url="http://isl.gforge.inria.fr/"
@@ -16,19 +16,10 @@ install=""
 subpackages="$pkgname-dev"
 source="http://isl.gforge.inria.fr/isl-$pkgver.tar.bz2"
 
-_builddir="$srcdir"/$pkgname-$pkgver
-prepare() {
-	local i
-	cd "$_builddir"
-	for i in $source; do
-		case $i in
-		*.patch) msg $i; patch -p1 -i "$srcdir"/$i || return 1;;
-		esac
-	done
-}
+builddir="$srcdir"/$pkgname-$pkgver
 
 build() {
-	cd "$_builddir"
+	cd "$builddir"
 	./configure \
 		--build=$CBUILD \
 		--host=$CHOST \
@@ -36,24 +27,21 @@ build() {
 		--mandir=/usr/share/man \
 		--infodir=/usr/share/info \
 		--localstatedir=/var \
-		--with-sysroot=${CBUILDROOT} \
-		|| return 1
-	make || return 1
+		--with-sysroot=${CBUILDROOT}
+	make
 }
 
 package() {
-	cd "$_builddir"
-	make DESTDIR="$pkgdir" INSTALL="install -D" install || return 1
+	cd "$builddir"
+	make DESTDIR="$pkgdir" INSTALL="install -D" install
 }
 
 dev() {
-	default_dev || return 1
+	default_dev
 	replaces="cloog-dev"
 	mkdir -p "$subpkgdir"/usr/share/gdb/python/auto-load/usr/lib
 	mv "$pkgdir"/usr/lib/*-gdb.py \
 		"$subpkgdir"/usr/share/gdb/python/auto-load/usr/lib/
 }
 
-md5sums="5184f543a013165e8057be59728664b1  isl-0.17.1.tar.bz2"
-sha256sums="d6307bf9a59514087abac3cbaab3d99393a0abb519354f7e7834a8c842310daa  isl-0.17.1.tar.bz2"
-sha512sums="b84f6cab0d9fc7cb64f3afc35fc5f8c05db3456c569510788d65d402ebe8116eb49c327b8055eaebdfd0cac4764f279c1832d5440db6ffa0e52331ac52096058  isl-0.17.1.tar.bz2"
+sha512sums="85d0b40f4dbf14cb99d17aa07048cdcab2dc3eb527d2fbb1e84c41b2de5f351025370e57448b63b2b8a8cf8a0843a089c3263f9baee1542d5c2e1cb37ed39d94  isl-0.18.tar.bz2"