diff --git a/extra/kalgebra/PKGBUILD b/extra/kalgebra/PKGBUILD
index f40e3724a..f8a5b260c 100644
--- a/extra/kalgebra/PKGBUILD
+++ b/extra/kalgebra/PKGBUILD
@@ -6,7 +6,7 @@
 #  - patch and cmake define to disable opengl for ARM
 
 pkgname=kalgebra
-pkgver=15.08.0
+pkgver=15.08.1
 pkgrel=1
 pkgdesc="Graph Calculator"
 url="http://kde.org/applications/education/kalgebra/"
@@ -20,11 +20,11 @@ conflicts=('kdeedu-kalgebra' 'kdeedu-analitza')
 install=${pkgname}.install
 source=("http://download.kde.org/stable/applications/${pkgver}/src/kalgebra-${pkgver}.tar.xz"
         'kalgebra-disable-opengl.patch')
-sha1sums=('9dc5d60ce589d1d106758b5b4e7807c05c6d04e7'
+sha1sums=('1f0625c516e1ba36a3f3784b1704735564196a9d'
           '103de918b6fdfb74a030db01afeb378fa0599717')
 
 prepare() {
-  mkdir build
+  mkdir -p build
   cd kalgebra-${pkgver}
   patch -p1 -i ../kalgebra-disable-opengl.patch
 }