diff -up GtkSharp-3.22.2/Source/meson.build.nolibdir GtkSharp-3.22.2/Source/meson.build
--- GtkSharp-3.22.2/Source/meson.build.nolibdir	2021-07-30 05:34:33.000000000 +0200
+++ GtkSharp-3.22.2/Source/meson.build	2022-08-07 14:27:13.414754013 +0200
@@ -74,7 +74,7 @@ version_data.set('PACKAGE_VERSION', pkg_
 
 install_infos = []
 nuget_infos = []
-lib_install_dir = join_paths(get_option('libdir'), 'mono', pkg_version)
+lib_install_dir = join_paths(get_option('prefix'), 'lib', 'mono', pkg_version)
 pkg_install_dir = join_paths(get_option('libdir'), 'pkgconfig')
 gapi_xml_installdir = join_paths(get_option('datadir'), 'gapi-3.0')
 
diff -up GtkSharp-3.22.2/Source/parser/meson.build.nolibdir GtkSharp-3.22.2/Source/parser/meson.build
--- GtkSharp-3.22.2/Source/parser/meson.build.nolibdir	2021-07-30 05:34:33.000000000 +0200
+++ GtkSharp-3.22.2/Source/parser/meson.build	2022-08-07 14:24:57.849163225 +0200
@@ -1,4 +1,4 @@
-gapi_installdir = join_paths(get_option('libdir'), 'gapi-3.0')
+gapi_installdir = join_paths(get_option('prefix'), 'lib', 'gapi-3.0')
 pkg_install_dir = '@0@/pkgconfig'.format(get_option('libdir'))
 
 gapi_parser = executable('gapi-parser', 'gapi-parser.cs',