AC_PATH_PROG searches either for a binary [pkcheck], or it uses the user provided absolute path in the variable PKCHECK_PATH. Since virt-polkit.m4 wipes the variable PKCHECK_PATH from environment the user decision is never used. Signed-off-by: Olaf Hering <olaf(a)aepfle.de&gt; --- a/m4/virt-polkit.m4 +++ b/m4/virt-polkit.m4 @@ -28,7 +28,6 @@ AC_DEFUN([LIBVIRT_CHECK_POLKIT], [ POLKIT_REQUIRED="0.6" POLKIT_CFLAGS= POLKIT_LIBS= - PKCHECK_PATH= with_polkit0=no with_polkit1=no