--- a/subprojects/libovf-glib/govf/meson.build
+++ b/subprojects/libovf-glib/govf/meson.build
@@ -39,7 +39,7 @@ govf_lib = shared_library('govf-' + api_version,
   govf_sources,
   dependencies: govf_deps,
   install: true,
-  install_dir: libdir
+  install_dir: get_option ('prefix') / libdir
 )
 
 govf_dep = declare_dependency(
--- a/subprojects/gtk-frdp/src/meson.build
+++ b/subprojects/gtk-frdp/src/meson.build
@@ -50,7 +50,7 @@ gtk_frdp_lib = shared_library('gtk-frdp-' + api_version,
   gtk_frdp_sources,
   dependencies: gtk_frdp_deps,
   install: true,
-  install_dir: libdir
+  install_dir: get_option ('prefix') / libdir
 )
 
 gtk_frdp_dep = declare_dependency(