diff -Nru libxmlb-0.1.8/debian/changelog libxmlb-0.1.8/debian/changelog
--- libxmlb-0.1.8/debian/changelog	2019-03-26 20:45:12.000000000 +0000
+++ libxmlb-0.1.8/debian/changelog	2019-05-09 14:58:46.000000000 +0000
@@ -1,3 +1,13 @@
+libxmlb (0.1.8-1~ubuntu18.04.1) bionic; urgency=medium
+
+  * Upload of libxmlb to bionic, it's needed to update fwupd to the 
+    current upstream version (lp: #1820768)
+  * debian/patches/old_meson_build.patch:
+    - don't require a newer-than-bionic meson version to build,
+      thanks Mario Limonciello
+
+ -- Sebastien Bacher <seb128@ubuntu.com>  Thu, 09 May 2019 16:50:27 +0200
+
 libxmlb (0.1.8-1) unstable; urgency=medium
 
   * New upstream version (0.1.8)
diff -Nru libxmlb-0.1.8/debian/patches/old_meson_build.patch libxmlb-0.1.8/debian/patches/old_meson_build.patch
--- libxmlb-0.1.8/debian/patches/old_meson_build.patch	1970-01-01 00:00:00.000000000 +0000
+++ libxmlb-0.1.8/debian/patches/old_meson_build.patch	2019-05-09 14:55:59.000000000 +0000
@@ -0,0 +1,87 @@
+From 378e1c3049ec94f344c2d8f336e84b5a1b0fdb31 Mon Sep 17 00:00:00 2001
+From: Mario Limonciello <mario.limonciello@dell.com>
+Date: Mon, 11 Mar 2019 15:51:41 -0500
+Subject: [PATCH] Allow compilation on older versions of meson
+
+This reverts commit 96437763b2b179e402e2660c06a0036397c29fcd
+and makes adjustments to dynamically decide what to do based upon
+meson version.
+
+This is intended to be used for backporting libxmlb to 18.04.
+---
+ meson.build             | 20 +++++++++++++++-----
+ src/libxmlb/meson.build | 18 +++++++++++++-----
+ 2 files changed, 28 insertions(+), 10 deletions(-)
+
+Index: libxmlb-0.1.8/meson.build
+===================================================================
+--- libxmlb-0.1.8.orig/meson.build
++++ libxmlb-0.1.8/meson.build
+@@ -1,7 +1,7 @@
+ project('libxmlb', 'c',
+   version : '0.1.8',
+   license : 'LGPL-2.1+',
+-  meson_version : '>=0.47.0',
++  meson_version : '>=0.45.0',
+   default_options : ['warning_level=2', 'c_std=c99'],
+ )
+ 
+@@ -90,8 +90,14 @@ test_link_args = [
+   '-Wl,-z,now',
+ ]
+ foreach link_arg: test_link_args
+-  if cc.has_link_argument(link_arg)
+-    global_link_args += link_arg
++  if meson.version().version_compare('>=0.46.0')
++    if cc.has_link_argument(link_arg)
++      global_link_args += link_arg
++    endif
++  else
++    if cc.has_argument(link_arg)
++      global_link_args += link_arg
++    endif
+   endif
+ endforeach
+ add_project_link_arguments(
+@@ -132,8 +138,12 @@ configure_file(
+   configuration : conf
+ )
+ 
+-python = import('python')
+-python3 = python.find_installation('python3')
++if meson.version().version_compare('>=0.46.0')
++  python = import('python')
++  python3 = python.find_installation('python3')
++else
++  python3 = find_program('python3')
++endif
+ 
+ subdir('data')
+ subdir('src')
+Index: libxmlb-0.1.8/src/libxmlb/meson.build
+===================================================================
+--- libxmlb-0.1.8.orig/src/libxmlb/meson.build
++++ libxmlb-0.1.8/src/libxmlb/meson.build
+@@ -2,9 +2,17 @@
+ # in order for including the headers from parent projects to work
+ # until https://github.com/mesonbuild/meson/issues/2546 is fixed
+ foreach header : xb_headers
+-  configure_file(
+-    copy : true,
+-    input : header,
+-    output : '@PLAINNAME@',
+-  )
++  if meson.version().version_compare('>=0.47.0')
++    configure_file(
++      copy : true,
++      input : header,
++      output : '@PLAINNAME@',
++    )
++  else
++    configure_file(
++      configuration : configuration_data(),
++      input : header,
++      output : '@PLAINNAME@',
++    )
++  endif
+ endforeach
diff -Nru libxmlb-0.1.8/debian/patches/series libxmlb-0.1.8/debian/patches/series
--- libxmlb-0.1.8/debian/patches/series	1970-01-01 00:00:00.000000000 +0000
+++ libxmlb-0.1.8/debian/patches/series	2019-05-09 14:55:53.000000000 +0000
@@ -0,0 +1 @@
+old_meson_build.patch