diff --git a/doc/meson.build b/doc/meson.build
index 62322e451..a1a91ba75 100644
--- a/doc/meson.build
+++ b/doc/meson.build
@@ -1,8 +1,8 @@
 doxyfile_conf = configuration_data()
 doxyfile_conf.set('PACKAGE_NAME', meson.project_name())
 doxyfile_conf.set('PACKAGE_VERSION', meson.project_version())
-doxyfile_conf.set('top_srcdir', meson.source_root())
-doxyfile_conf.set('top_builddir', meson.build_root())
+doxyfile_conf.set('top_srcdir', meson.project_source_root())
+doxyfile_conf.set('top_builddir', meson.project_build_root())
 
 dot_found = find_program('dot', required: false).found()
 summary({'dot (used with doxygen)': dot_found}, bool_yn: true, section: 'Optional programs')
@@ -20,27 +20,27 @@ extra_docs = [
 
 inputs = []
 foreach extra : extra_docs
-  inputs += meson.source_root() / 'doc' / extra
+  inputs += meson.project_source_root() / 'doc' / extra
 endforeach
 foreach h : media_session_sources
-  inputs += meson.source_root() / 'src' / h
+  inputs += meson.project_source_root() / 'src' / h
 endforeach
 
 path_prefixes = [
-  meson.source_root() / 'src',
-  meson.source_root(),
+  meson.project_source_root() / 'src',
+  meson.project_source_root(),
 ]
 
 cssfiles = [
-  meson.source_root() / 'doc' / 'doxygen-awesome.css',
-  meson.source_root() / 'doc' / 'custom.css'
+  meson.project_source_root() / 'doc' / 'doxygen-awesome.css',
+  meson.project_source_root() / 'doc' / 'custom.css'
 ]
 
 doxyfile_conf.set('inputs', ' '.join(inputs))
 doxyfile_conf.set('cssfiles', ' '.join(cssfiles))
 doxyfile_conf.set('path_prefixes', ' '.join(path_prefixes))
-doxyfile_conf.set('c_input_filter', meson.source_root() / 'doc' / 'input-filter.sh')
-doxyfile_conf.set('h_input_filter', meson.source_root() / 'doc' / 'input-filter-h.sh')
+doxyfile_conf.set('c_input_filter', meson.project_source_root() / 'doc' / 'input-filter.sh')
+doxyfile_conf.set('h_input_filter', meson.project_source_root() / 'doc' / 'input-filter-h.sh')
 
 doxyfile = configure_file(input: 'Doxyfile.in',
                           output: 'Doxyfile',
diff --git a/meson.build b/meson.build
index c8c2c2fe1..e20b782d4 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project('media-session', ['c'],
   version : '0.3.38',
   license : [ 'MIT', 'LGPL-2.1-or-later', 'GPL-2.0-only' ],
-  meson_version : '>= 0.54.0',
+  meson_version : '>= 0.56.0',
   default_options : [ 'warning_level=3',
                       'c_std=gnu99',
                       'b_pie=true',
@@ -124,7 +124,7 @@ endif
 setenv = find_program('media-session-uninstalled.sh')
 run_target('media-session-uninstalled',
            command : [setenv,
-                      '-b@0@'.format(meson.build_root()),
+                      '-b@0@'.format(meson.project_build_root()),
                       '-v@0@'.format(media_session_version)]
 )
 
diff --git a/systemd/system/meson.build b/systemd/system/meson.build
index c9736872e..ab0d49064 100644
--- a/systemd/system/meson.build
+++ b/systemd/system/meson.build
@@ -1,4 +1,5 @@
-systemd_system_services_dir = systemd.get_pkgconfig_variable('systemdsystemunitdir', define_variable : [ 'prefix', prefix])
+systemd_system_services_dir = systemd.get_variable(pkgconfig: 'systemdsystemunitdir',
+                                                   pkgconfig_define: [ 'prefix', prefix])
 
 systemd_config = configuration_data()
 systemd_config.set('PW_MEDIA_SESSION_BINARY', media_session_bindir / 'pipewire-media-session')
diff --git a/systemd/user/meson.build b/systemd/user/meson.build
index b9a8d00fb..ee2e87fc6 100644
--- a/systemd/user/meson.build
+++ b/systemd/user/meson.build
@@ -1,4 +1,5 @@
-systemd_user_services_dir = systemd.get_pkgconfig_variable('systemduserunitdir', define_variable : [ 'prefix', prefix])
+systemd_user_services_dir = systemd.get_variable(pkgconfig: 'systemduserunitdir',
+                                                 pkgconfig_define: [ 'prefix', prefix])
 if get_option('systemd-user-unit-dir') != ''
   systemd_user_services_dir = get_option('systemd-user-unit-dir')
 endif