this was necessary for me to get it to build in a chroot:
diff --git a/PKGBUILD b/PKGBUILD
index f103a43..2be161c 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -29,6 +29,7 @@ makedepends=('cmake'
'bash'
'miniupnpc'
'jsoncpp'
+ 'qt5-script'
'qt5-multimedia'
'qt5-tools'
'qt5-xmlpatterns'
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