diff --git a/testing/keydb/APKBUILD b/testing/keydb/APKBUILD
index 1ed8418590a..8adcf668ec8 100644
--- a/testing/keydb/APKBUILD
+++ b/testing/keydb/APKBUILD
@@ -53,6 +53,11 @@ _make_opts="\
 	USE_SYSTEMD=no \
 	"
 
+prepare() {
+	default_prepare
+	update_config_guess
+}
+
 build() {
 	export CFLAGS="$CFLAGS -O2"
 
diff --git a/testing/liblinbox/APKBUILD b/testing/liblinbox/APKBUILD
index d5be20d3547..b48f535fe28 100644
--- a/testing/liblinbox/APKBUILD
+++ b/testing/liblinbox/APKBUILD
@@ -24,6 +24,11 @@ source="https://github.com/linbox-team/linbox/releases/download/v$pkgver/linbox-
 subpackages="$pkgname-static $pkgname-dev $pkgname-doc"
 builddir="$srcdir/linbox-$pkgver"
 
+prepare() {
+	default_prepare
+	update_config_sub
+}
+
 build() {
 	export CXXFLAGS="${CXXFLAGS/-Os/-O3}" # gotta go fast