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diff --git a/PKGBUILD b/PKGBUILD
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+# Maintainer: Anton Kudelin <kudelin at protonmail dot com>
+
+pkgname=sirius
+_PkgName=SIRIUS
+pkgver=6.4.2
+pkgrel=1
+pkgdesc="Domain specific library for electronic structure calculations"
+arch=('x86_64')
+license=('BSD')
+url="https://github.com/electronic-structure/SIRIUS"
+depends=('libvdwxc' 'libxc' 'spglib' 'elpa' 'spfft' 'gsl' 'hdf5')
+makedepends=('cmake')
+optdepends=('magma: Linear algebra on GPU')
+source=("$url/archive/v$pkgver.tar.gz")
+sha256sums=('40b9b66deebb6538fc0f4cd802554d0d763ea6426b9b2f0e8db8dc617e494479')
+options=(!emptydirs)
+
+prepare() {
+    mkdir $srcdir/build
+    
+    # Checking if nvcc is in PATH
+    if [[ $( echo -n $( which nvcc) | tail -c 4 ) == nvcc && \
+        -e /usr/lib/libmagma.so ]]
+    then
+        export _ACC=ON
+        export LDFLAGS="$LDFLAGS -L/opt/cuda/lib64"
+        echo "GPU is enabled"
+    else
+        export _ACC=OFF
+        echo "GPU is disabled"
+    fi
+    
+    # Finding ELPA version
+    _ELPAVER=$( ls /usr/include | grep elpa | sed 's/elpa_openmp-//g' )
+}
+
+build() {
+    cd $srcdir/build
+    cmake ../$_PkgName-$pkgver \
+        -DCMAKE_INSTALL_PREFIX=/usr \
+        -DCREATE_FORTRAN_BINDINGS=ON \
+        -DUSE_OPENMP=ON \
+        -DUSE_SCALAPACK=ON \
+        -DUSE_MAGMA=$_ACC \
+        -DUSE_CUDA=$_ACC \
+        -DUSE_VDWXC=ON \
+        -DUSE_ELPA=ON \
+        -DELPA_INCLUDE_DIR=/usr/include/elpa_openmp-$_ELPAVER/elpa
+    make
+}
+
+package() {
+    cd $srcdir/build
+    install -dm755 $pkgdir/usr/share/licenses/$pkgname
+    install ../$_PkgName-$pkgver/LICENSE $pkgdir/usr/share/licenses/$pkgname
+    make DESTDIR=$pkgdir install
+    install -m755 $srcdir/build/src/mod_files/*.mod $pkgdir/usr/include/sirius
+    mv $pkgdir/usr/bin/atom $pkgdir/usr/bin/sirius_atom
+}