Copy the unpacked archive instead of unpacking it again

Unpacking it while preserving permissions (`-p`) leads to world-writable
files.  To prevent this, the files are copied from the `$srcdir`, where
the permissions are already set up properly by makepkg.

This was reported by namcap.

2 files changed, 4 insertions, 3 deletions

diff --git a/.SRCINFO b/.SRCINFO
index 33c0fd0750bd..ee18ff6a6024 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,7 +1,7 @@
 pkgbase = zenkit
 	pkgdesc = A platform for collaboration and project management
 	pkgver = 20201217
-	pkgrel = 2
+	pkgrel = 3
 	url = https://zenkit.com
 	arch = x86_64
 	license = Commercial
diff --git a/PKGBUILD b/PKGBUILD
index 3365fed9ae98..9da8984c7845 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -6,7 +6,7 @@
 pkgbase=zenkit
 pkgname=zenkit
 pkgver=20201217
-pkgrel=2
+pkgrel=3
 pkgdesc='A platform for collaboration and project management'
 arch=('x86_64')
 url='https://zenkit.com'
@@ -21,6 +21,7 @@ source=('https://static.zenkit.com/downloads/desktop-apps/base/zenkit-base-linux
 sha512sums=('b34633e89c6778d5c2ca3f9928215ce356ff9d44303cdad6fe71731e57873500aababa5fa29d78719cdf456e3ed502d7fdfeaeb91336211f3b818854d9074130'
             '58137e4f6f50baae693a48ec2f6f0112abf62d28287e3fec86289d20aac77a023373fe23514e32cab463e298679995f68a545d8f1c8f260ce57020b6873d7811'
             '5b824efd2de3d8b213d850b5b1b2920583c7b2b9c25e77667b041aa65f97b368c6da888cc4ae700d11fa336a9668ddfe2ad062caa4ce1af83dfbf50fa4c103fb')
+
 package() {
     install -dm755 "${pkgdir}/opt/"
     install -dm755 "${pkgdir}/usr/bin/"
@@ -30,7 +31,7 @@ package() {
 
     mkdir "${pkgdir}/opt/${pkgbase}"
 
-    tar xpf zenkit-base-linux.tar.gz -C "${pkgdir}/opt/${pkgbase}/" --strip-components=1
+    cp -a "${srcdir}/zenkit-base-linux" "${pkgdir}/opt/${pkgbase}"
     install "${srcdir}/favicon.ico" "${pkgdir}/opt/${pkgbase}/zenkit.ico"
 
     ln -s "/opt/${pkgbase}/${pkgbase}" "${pkgdir}/usr/bin/${pkgbase}"