diff --git a/mingw-w64-lapack/PKGBUILD b/mingw-w64-lapack/PKGBUILD
index b213e983e7..85a318450b 100644
--- a/mingw-w64-lapack/PKGBUILD
+++ b/mingw-w64-lapack/PKGBUILD
@@ -16,47 +16,38 @@ url="http://www.netlib.org/lapack"
 source=("http://www.netlib.org/${_realname}/${_realname}-${pkgver}.tgz")
 sha256sums=('a9a0082c918fe14e377bbd570057616768dca76cbdc713457d8199aaa233ffc3')
 
-build()
-{
-  mkdir -p ${pkgdir}${MINGW_PREFIX}
-  pushd ${pkgdir}${MINGW_PREFIX} > /dev/null
-  export PREFIX_WIN=`pwd -W`
-  popd > /dev/null
-
-  pushd ${MINGW_PREFIX} > /dev/null
-  export PREFIX_DEPS=`pwd -W`
-  popd > /dev/null
-
+build() {
   cd "$srcdir"
   mkdir -p build-${CARCH} && cd build-${CARCH}
-  ${MINGW_PREFIX}/bin/cmake \
-    -G"MSYS Makefiles" \
-    -DCMAKE_INSTALL_PREFIX:PATH=${PREFIX_WIN} \
-    -DCMAKE_Fortran_COMPILER:PATH=${PREFIX_DEPS}/bin/gfortran.exe \
-    -DCMAKE_BUILD_TYPE=Release \
-    -DBUILD_SHARED_LIBS=ON \
-    -DCMAKE_NEED_RESPONSE=ON \
-    -DBUILD_TESTING=OFF \
-    ../${_realname}-${pkgver}
+  MSYS2_ARG_CONV_EXCL="-DCMAKE_INSTALL_PREFIX=" \
+    ${MINGW_PREFIX}/bin/cmake \
+      -G"MSYS Makefiles" \
+      -DCMAKE_INSTALL_PREFIX=${MINGW_PREFIX} \
+      -DCMAKE_Fortran_COMPILER=${MINGW_PREFIX}/bin/gfortran.exe \
+      -DCMAKE_BUILD_TYPE=Release \
+      -DBUILD_SHARED_LIBS=ON \
+      -DCMAKE_NEED_RESPONSE=ON \
+      -DBUILD_TESTING=OFF \
+      ../${_realname}-${pkgver}
   make
 
   cd "$srcdir"
   mkdir -p build-${CARCH}s && cd build-${CARCH}s
-  ${MINGW_PREFIX}/bin/cmake \
-    -G"MSYS Makefiles" \
-    -DCMAKE_INSTALL_PREFIX:PATH=${PREFIX_WIN} \
-    -DCMAKE_Fortran_COMPILER:PATH=${PREFIX_DEPS}/bin/gfortran.exe \
-    -DCMAKE_BUILD_TYPE=Release \
-    -DBUILD_SHARED_LIBS=OFF \
-    -DBUILD_TESTING=OFF \
-    ../${_realname}-${pkgver}
+  MSYS2_ARG_CONV_EXCL="-DCMAKE_INSTALL_PREFIX=" \
+    ${MINGW_PREFIX}/bin/cmake \
+      -G"MSYS Makefiles" \
+      -DCMAKE_INSTALL_PREFIX=${MINGW_PREFIX} \
+      -DCMAKE_Fortran_COMPILER=${MINGW_PREFIX}/bin/gfortran.exe \
+      -DCMAKE_BUILD_TYPE=Release \
+      -DBUILD_SHARED_LIBS=OFF \
+      -DBUILD_TESTING=OFF \
+      ../${_realname}-${pkgver}
   make
 }
 
-package()
-{
+package() {
   cd "$srcdir/build-${CARCH}s"
-  make install # DESTDIR="$pkgdir"
+  make DESTDIR="$pkgdir" install
   cd "$srcdir/build-${CARCH}"
-  make install # DESTDIR="$pkgdir"
+  make DESTDIR="$pkgdir" install
 }