diff -ur rpm-4.5.orig/scripts/rpm2cpio rpm-4.5/scripts/rpm2cpio
--- rpm-4.5.orig/scripts/rpm2cpio	2019-05-09 09:04:23.679000000 +0200
+++ rpm-4.5/scripts/rpm2cpio	2019-05-09 09:22:11.921000000 +0200
@@ -27,9 +27,11 @@
       | dd bs=3 count=1 2> /dev/null)
 
 gz="$(echo -en '\037\0213')"
+xz="$(echo -en '\0375\0067\0172')"
 case "$comp" in
     BZh)      dd if="$pkg" ibs=$o skip=1 2>/dev/null | bunzip2 ;;
     "$gz"*)   dd if="$pkg" ibs=$o skip=1 2>/dev/null | gunzip ;;
+    "$xz"*)   dd if="$pkg" ibs=$o skip=1 2>/dev/null | unxz ;;
     # no magic in old lzma format, if unknown we assume that's lzma for now
     *)        dd if="$pkg" ibs=$o skip=1 2>/dev/null | lzma -dc - ;;
     #*)        echo "Unrecognized rpm file: $pkg"; return 1 ;;