xtrlock: work around ancient python configure script

srcpkgs/xtrlock/template

@@ -2,8 +2,7 @@
 pkgname=xtrlock
 version=3.4
 revision=2
-build_style=configure
-hostmakedepends="pkg-config python"
+build_wrksrc="src"
 makedepends="libX11-devel pam-devel"
 short_desc="PAM based X11 screen locker"
 maintainer="Leah Neukirchen <leah@vuxu.org>"
@@ -12,6 +11,14 @@ homepage="https://github.com/aanatoly/xtrlock-pam"
 distfiles="https://github.com/aanatoly/xtrlock-pam/archive/${version}.tar.gz"
 checksum=dcc4b37a1ec303a99c9ef96412f6ba875f0c06355cdfdf4605a2a0a9e144c5d2
 
-post_install() {
+do_build() {
+	touch config.h
+	$CC $CFLAGS -DPROJECT_NAME="\"${pkgname}-${version}\"" \
+		-DPROJECT_VERSION="\"${version}\"" \
+		-o xtrlock-pam *.c $LDFLAGS -lX11 -lpam
+}
+
+do_install() {
+	vbin xtrlock-pam
 	ln -s xtrlock-pam ${DESTDIR}/usr/bin/xtrlock
 }