jsoncpp: Fix install directory

jsoncpp/PKGBUILD

@@ -12,11 +12,11 @@ makedepends=("gcc"
              "python2"
             )
 options=('staticlibs' '!strip' '!buildflags')
-source=("https://github.com/open-source-parsers/jsoncpp/archive/$pkgver.tar.gz")
+source=(${pkgname}-${pkgver}.tar.gz::"https://github.com/open-source-parsers/jsoncpp/archive/${pkgver}.tar.gz")
 sha256sums=('2179a7df19c1c6dc87e02c65b847efc914625a9b87df3e443d9610fc70c0f557')
 
 prepare() {
-  cd "${srcdir}/${pkgname}-$pkgver"
+  cd "${srcdir}/${pkgname}-${pkgver}"
 }
 
 build() {
@@ -24,17 +24,15 @@ build() {
   cd "${srcdir}/build-${CARCH}"
 
   cmake \
-    -DCMAKE_INSTALL_PREFIX:PATH="${pkgdir}" \
-    -DINCLUDE_INSTALL_DIR:PATH="${pkgdir}/include" \
-    -DLIBRARY_INSTALL_DIR:PATH="${pkgdir}/lib" \
+    -DCMAKE_INSTALL_PREFIX=/usr \
     -DCMAKE_BUILD_TYPE=Release \
     -DJSONCPP_WITH_CMAKE_PACKAGE=ON \
-    "${srcdir}/${pkgname}-$pkgver"
+    ../${pkgname}-${pkgver}
 
   make
 }
 
 package() {
   cd "${srcdir}/build-${CARCH}"
-  make install
+  make DESTDIR=${pkgdir} install
 }