diff --git a/desktop/meson.build b/desktop/meson.build
index 79698674..f0c8a660 100644
--- a/desktop/meson.build
+++ b/desktop/meson.build
@@ -16,7 +16,7 @@ desktop_file = i18n.merge_file(
   type: 'desktop',
   po_dir: po_dir,
   install: true,
-  install_dir: join_paths(datadir, 'applications')
+  install_dir: join_paths(data_dir, 'applications')
 )
 desktop_output += desktop_file
 
@@ -30,7 +30,7 @@ autostart_file = i18n.merge_file(
   type: 'desktop',
   po_dir: po_dir,
   install: true,
-  install_dir: join_paths(datadir, 'applications')
+  install_dir: join_paths(data_dir, 'applications')
 )
 desktop_output += autostart_file
 
@@ -60,7 +60,7 @@ appdata_merged = i18n.merge_file(
   type: 'xml',
   po_dir: po_dir,
   install: true,
-  install_dir: join_paths(datadir, 'metainfo')
+  install_dir: join_paths(data_dir, 'metainfo')
 )
 
 if appstream_util.found()
@@ -87,11 +87,11 @@ if install_contractor_file
     output: 'geary-attach.contract',
     command: [msgfmt, '--desktop', '--keyword=Description', '--template', '@INPUT@', '-d', po_dir, '-o', '@OUTPUT@'],
     install: true,
-    install_dir: join_paths(datadir, 'contractor')
+    install_dir: join_paths(data_dir, 'contractor')
   )
 
   install_data('geary-attach',
-    install_dir: bindir,
+    install_dir: bin_dir,
   )
 endif
 
@@ -108,7 +108,7 @@ geary_compiled_schema = gnome.compile_schemas(
   depend_files: files('org.gnome.Geary.gschema.xml'),
 )
 install_data('org.gnome.Geary.gschema.xml',
-  install_dir: join_paths(datadir, 'glib-2.0', 'schemas'),
+  install_dir: join_paths(data_dir, 'glib-2.0', 'schemas'),
 )
 
 #
@@ -116,7 +116,7 @@ install_data('org.gnome.Geary.gschema.xml',
 #
 
 service_conf = configuration_data()
-service_conf.set('bindir', bindir)
+service_conf.set('bindir', bin_dir)
 service_conf.set('appid', geary_id)
 
 configure_file(
diff --git a/icons/meson.build b/icons/meson.build
index eb581369..2234d3b0 100644
--- a/icons/meson.build
+++ b/icons/meson.build
@@ -1,4 +1,4 @@
-system_icons_dir = join_paths(datadir, 'icons', 'hicolor')
+system_icons_dir = join_paths(data_dir, 'icons', 'hicolor')
 
 icon_files = files(
   'mail-archive-symbolic.svg',
@@ -45,7 +45,7 @@ scalable_dir = join_paths('hicolor', 'scalable', 'apps')
 
 install_data(
   join_paths(scalable_dir, 'org.gnome.Geary.svg'),
-  install_dir: join_paths(datadir, 'icons', scalable_dir),
+  install_dir: join_paths(data_dir, 'icons', scalable_dir),
   rename: '@0@.svg'.format(geary_id)
 )
 
@@ -53,7 +53,6 @@ symbolic_dir = join_paths('hicolor', 'symbolic', 'apps')
 
 install_data(
   join_paths(symbolic_dir, 'org.gnome.Geary-symbolic.svg'),
-  install_dir: join_paths(datadir, 'icons', symbolic_dir),
+  install_dir: join_paths(data_dir, 'icons', symbolic_dir),
   rename: '@0@-symbolic.svg'.format(geary_id)
 )
-
diff --git a/meson.build b/meson.build
index 70ccc494..4eaf707d 100644
--- a/meson.build
+++ b/meson.build
@@ -37,16 +37,22 @@ cc = meson.get_compiler('c')
 valac = meson.get_compiler('vala')
 config_h_dir = include_directories('.')
 geary_prefix = get_option('prefix')
-bindir = join_paths(geary_prefix, get_option('bindir'))
-datadir = join_paths(geary_prefix, get_option('datadir'))
-libdir = join_paths(geary_prefix, get_option('libdir'))
-locale_dir = join_paths(geary_prefix, get_option('localedir'))
+
+# Source dirs
+metadata_dir = join_paths(meson.source_root(), 'bindings', 'metadata')
 po_dir = join_paths(meson.source_root(), 'po')
 vapi_dir = join_paths(meson.source_root(), 'bindings', 'vapi')
-metadata_dir = join_paths(meson.source_root(), 'bindings', 'metadata')
-dbus_services_dir = join_paths(datadir, 'dbus-1', 'services')
-web_extensions_dir = join_paths(libdir, 'geary', 'web-extensions')
-plugins_dir = join_paths(libdir, 'geary', 'plugins')
+
+# Configurable install dirs
+bin_dir = join_paths(geary_prefix, get_option('bindir'))
+data_dir = join_paths(geary_prefix, get_option('datadir'))
+lib_dir = join_paths(geary_prefix, get_option('libdir'))
+locale_dir = join_paths(geary_prefix, get_option('localedir'))
+
+# Static install dirs
+dbus_services_dir = join_paths(data_dir, 'dbus-1', 'services')
+plugins_dir = join_paths(lib_dir, 'geary', 'plugins')
+web_extensions_dir = join_paths(lib_dir, 'geary', 'web-extensions')
 
 # Make sure Meson can find our custom VAPI's
 add_project_arguments([
diff --git a/sql/meson.build b/sql/meson.build
index a8ec43e4..126f2982 100644
--- a/sql/meson.build
+++ b/sql/meson.build
@@ -27,5 +27,5 @@ sql_files = [
 ]
 
 install_data(sql_files,
-  install_dir: join_paths(datadir, meson.project_name(), 'sql')
+  install_dir: join_paths(data_dir, meson.project_name(), 'sql')
 )