diff --git a/docs/reference/cinnamon-js/meson.build b/docs/reference/cinnamon-js/meson.build
index 66a5e156eb..c1ad842002 100644
--- a/docs/reference/cinnamon-js/meson.build
+++ b/docs/reference/cinnamon-js/meson.build
@@ -2,7 +2,7 @@ gen_doc = files('gen_doc.py')
 
 parts_files = custom_target(
     'js-doc-gen',
-    command: [python, gen_doc, meson.source_root(), join_paths(meson.build_root(), '@OUTDIR@')],
+    command: [python, gen_doc, meson.project_source_root(), join_paths(meson.project_build_root(), '@OUTDIR@')],
     # input: ['cinnamon-js-docs.sgml'],
     output: ['ui.xml', 'misc.xml'],
     build_by_default: true,
diff --git a/docs/reference/cinnamon-tutorials/meson.build b/docs/reference/cinnamon-tutorials/meson.build
index 360fe2cf84..c31019458d 100644
--- a/docs/reference/cinnamon-tutorials/meson.build
+++ b/docs/reference/cinnamon-tutorials/meson.build
@@ -3,8 +3,8 @@ gnome.gtkdoc(
     mode: 'xml',
     main_xml: 'cinnamon-tutorials-docs.sgml',
     src_dir: [
-        join_paths(meson.source_root(), 'src'),
-        join_paths(meson.build_root(), 'src'),
+        join_paths(meson.project_source_root(), 'src'),
+        join_paths(meson.project_build_root(), 'src'),
     ],
     mkdb_args: ['--xml-mode', '--output-format=xml'],
     html_assets: 'settings.png',
diff --git a/docs/reference/cinnamon/meson.build b/docs/reference/cinnamon/meson.build
index 833016d9f8..fec3ed34de 100644
--- a/docs/reference/cinnamon/meson.build
+++ b/docs/reference/cinnamon/meson.build
@@ -31,8 +31,8 @@ gnome.gtkdoc(
     gobject_typesfile: 'cinnamon.types',
     dependencies: [libcinnamon_deps, st_dep, cinnamon_dep],
     src_dir: [
-        join_paths(meson.source_root(), 'src'),
-        join_paths(meson.build_root(), 'src'),
+        join_paths(meson.project_source_root(), 'src'),
+        join_paths(meson.project_build_root(), 'src'),
     ],
     scan_args: '--rebuild-types',
     mkdb_args: ['--xml-mode', '--output-format=xml'],
diff --git a/docs/reference/st/meson.build b/docs/reference/st/meson.build
index ddedd071aa..50d47e93aa 100644
--- a/docs/reference/st/meson.build
+++ b/docs/reference/st/meson.build
@@ -5,8 +5,8 @@ gnome.gtkdoc(
     gobject_typesfile: 'cinnamon-st.types',
     dependencies: [st_dep],
     src_dir: [
-        join_paths(meson.source_root(), 'src', 'st'),
-        join_paths(meson.build_root(), 'src', 'st'),
+        join_paths(meson.project_source_root(), 'src', 'st'),
+        join_paths(meson.project_build_root(), 'src', 'st'),
     ],
     scan_args: '--rebuild-types',
     mkdb_args: ['--xml-mode', '--output-format=xml'],
diff --git a/meson.build b/meson.build
index dcd52fee79..88f9a91a7e 100644
--- a/meson.build
+++ b/meson.build
@@ -1,4 +1,4 @@
-project('Cinnamon', 'c', version : '5.8.4', meson_version : '>=0.47.0')
+project('Cinnamon', 'c', version : '5.8.4', meson_version : '>=0.56.0')
 
 gnome = import('gnome')
 i18n = import('i18n')
@@ -19,7 +19,7 @@ pkglibdir = join_paths(libdir, meson.project_name().to_lower())
 girdir = join_paths(datadir, 'gir-1.0')
 servicedir = join_paths(datadir, 'dbus-1', 'services')
 pkgdatadir = join_paths(datadir, meson.project_name().to_lower())
-po_dir = join_paths(meson.source_root(), 'po')
+po_dir = join_paths(meson.project_source_root(), 'po')
 
 # dependencies
 cjs = dependency('cjs-1.0', version: '>= 4.8.0')
@@ -40,7 +40,7 @@ glib_version = '2.52.0'
 glib = dependency('glib-2.0', version: '>= ' + glib_version)
 gtk = dependency('gtk+-3.0', version: '>= 3.12.0')
 muffin = dependency('libmuffin-0', version: '>= 5.2.0')
-muffin_typelibdir = muffin.get_pkgconfig_variable('typelibdir')
+muffin_typelibdir = muffin.get_variable(pkgconfig: 'typelibdir')
 pango = dependency('muffin-cogl-pango-0')
 xapp = dependency('xapp', version: '>= 2.6.0')
 X11 = dependency('x11')
diff --git a/src/st/meson.build b/src/st/meson.build
index 285a158a4e..4d062b7846 100644
--- a/src/st/meson.build
+++ b/src/st/meson.build
@@ -135,7 +135,7 @@ st_gir_sources = [
     st_headers,
 ]
 
-data_to_c = find_program(meson.source_root() + '/src/data-to-c.pl')
+data_to_c = find_program(meson.project_source_root() + '/src/data-to-c.pl')
 
 glsl_sources = custom_target('scroll-view-fade-glsl',
   input: ['st-scroll-view-fade.glsl'],