diff --git a/libguestfs.spec b/libguestfs.spec
index 86978b3..2eb6c35 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -391,6 +391,7 @@ arch=i686 #?
 cp -avL /boot/vmlinuz mkinitrd/boot_tmp/vmlinuz.${arch}
 cp -avL /boot/System.map-${kver} mkinitrd/boot_tmp
 env PATH=${RPM_BUILD_ROOT}/usr/bin:${RPM_BUILD_ROOT}/usr/sbin:${PATH} \
+bash -x \
 /sbin/mkinitrd \
 	-l $PWD/mkinitrd \
 	-k vmlinuz.${arch} \