diff --git a/community/kbruch/APKBUILD b/community/kbruch/APKBUILD
index d1e8b6a7069..6c57b023ed0 100644
--- a/community/kbruch/APKBUILD
+++ b/community/kbruch/APKBUILD
@@ -4,8 +4,8 @@ pkgname=kbruch
 pkgver=21.04.2
 pkgrel=0
 # armhf blocked by extra-cmake-modules
-# s390x blocked by kxmlgui
-arch="all !armhf !s390x !mips64"
+# s390x, mips64 and riscv64 blocked by polkit
+arch="all !armhf !s390x !mips64 !riscv64"
 url="https://edu.kde.org/kbruch/"
 pkgdesc="Practice Fractions"
 license="GPL-2.0-or-later AND GFDL-1.2-only"
@@ -37,7 +37,7 @@ check() {
 }
 
 package() {
-	DESTDIR="$pkgdir" cmake --build build --target install
+	DESTDIR="$pkgdir" cmake --install build
 }
 
 sha512sums="