diff --git a/extra/qtcreator/PKGBUILD b/extra/qtcreator/PKGBUILD
index bcae83f4b..e4612d65d 100644
--- a/extra/qtcreator/PKGBUILD
+++ b/extra/qtcreator/PKGBUILD
@@ -15,14 +15,15 @@ buildarch=12
 
 pkgname=qtcreator
 pkgver=4.5.0
-pkgrel=1
+_clangver=5.0.1
+pkgrel=2
 pkgdesc='Lightweight, cross-platform integrated development environment'
-arch=('x86_64')
+arch=(x86_64)
 url='http://qt-project.org'
-license=('LGPL')
-depends=('qt5-tools' 'qt5-quickcontrols' 'qt5-quickcontrols2' 'qt5-webengine' 'clang' 'qbs')
-makedepends=('git' 'mesa' 'llvm')
-options=('docs')
+license=(LGPL)
+depends=(qt5-tools qt5-quickcontrols qt5-quickcontrols2 qt5-webengine clang=$_clangver qbs)
+makedepends=(git mesa llvm)
+options=(docs)
 optdepends=('qt5-doc: integrated Qt documentation'
             'qt5-examples: welcome page examples'
             'qt5-translations: for other languages'
@@ -38,8 +39,7 @@ sha512sums=('9296ebef4a3d5ae40a9fa3a4039e77b8e407dfb52af3a88b4cc615a89e163d92de4
             'af0a0d5a2fadcfce14def65be73c99bff8227794b9ad2be333713c89e226e2c6b43802a802b6e30f3e6c1b4b77f31183bffdcca3404d9686f15fa84dfc64d1a1')
 
 prepare() {
-  [[ -d build ]] && rm -r build
-  mkdir build
+  mkdir -p build
 
   # fix hardcoded libexec path
   sed -e 's|libexec\/qtcreator|lib\/qtcreator|g' -i qt-creator-opensource-src-${pkgver}/qtcreator.pri
@@ -62,8 +62,8 @@ build() {
 package() {
   cd build
 
-  make INSTALL_ROOT="${pkgdir}/usr/" install
-  make INSTALL_ROOT="${pkgdir}/usr/" install_docs
+  make INSTALL_ROOT="$pkgdir/usr/" install
+  make INSTALL_ROOT="$pkgdir/usr/" install_docs
 
-  install -Dm644 ${srcdir}/qt-creator-opensource-src-${pkgver}/LICENSE.GPL3-EXCEPT ${pkgdir}/usr/share/licenses/qtcreator/LICENSE.GPL3-EXCEPT
+  install -Dm644 "$srcdir"/qt-creator-opensource-src-$pkgver/LICENSE.GPL3-EXCEPT "$pkgdir"/usr/share/licenses/qtcreator/LICENSE.GPL3-EXCEPT
 }