diff --git a/build-aux/meson_post_install.py b/build-aux/meson_post_install.py
index bfdbebe..aefcadf 100644
--- a/build-aux/meson_post_install.py
+++ b/build-aux/meson_post_install.py
@@ -5,16 +5,14 @@ import os
 import subprocess
 
 install_prefix = os.environ['MESON_INSTALL_PREFIX']
-schemadir = os.path.join(install_prefix, 'share', 'glib-2.0', 'schemas')
 
 if not os.environ.get('DESTDIR'):
-    print('Compiling gsettings schemas…')
-    subprocess.call(['glib-compile-schemas', schemadir])
-
-    print('Updating icon cache…')
     icon_cache_dir = os.path.join(install_prefix, 'share', 'icons', 'hicolor')
-    subprocess.call(['gtk-update-icon-cache', '-qtf', icon_cache_dir])
+    if os.path.exists(icon_cache_dir):
+        print('Updating icon cache…')
+        subprocess.call(['gtk-update-icon-cache', '-qtf', icon_cache_dir])
 
-    print('Updating desktop database…')
     desktop_database_dir = os.path.join(install_prefix, 'share', 'applications')
-    subprocess.call(['update-desktop-database', '-q', desktop_database_dir])
+    if os.path.exists(desktop_database_dir):
+        print('Updating desktop database…')
+        subprocess.call(['update-desktop-database', '-q', desktop_database_dir])
diff --git a/meson.build b/meson.build
index 7f7b24d..3b50f4e 100644
--- a/meson.build
+++ b/meson.build
@@ -44,6 +44,7 @@ polkitpolicydir = polkit_gobject.get_pkgconfig_variable('policydir',
 config_h = configuration_data()
 config_h.set_quoted('GETTEXT_PACKAGE', 'malcontent')
 config_h.set_quoted('PACKAGE_LOCALE_DIR', join_paths(get_option('prefix'), get_option('localedir')))
+config_h.set_quoted('PAMLIBDIR', pamlibdir)
 config_h.set_quoted('VERSION', meson.project_version())
 configure_file(
   output: 'config.h',
diff --git a/pam/tests/pam_malcontent.c b/pam/tests/pam_malcontent.c
index 871516b..8aebb3d 100644
--- a/pam/tests/pam_malcontent.c
+++ b/pam/tests/pam_malcontent.c
@@ -24,6 +24,7 @@
 #include <glib.h>
 #include <locale.h>
 #include <stdlib.h>
+#include "config.h"
 
 /* Test that the `pam_malcontent.so` module can be loaded using dlopen() and
  * that it exports the appropriate symbols for PAM to be able to use it. */
@@ -37,6 +38,13 @@ test_pam_malcontent_dlopen (void)
 
   module_path = g_test_build_filename (G_TEST_BUILT, "..", "pam_malcontent.so", NULL);
 
+  /* Installed tests version. */
+  if (!g_file_test (module_path, G_FILE_TEST_EXISTS))
+    {
+      g_free (module_path);
+      module_path = g_build_filename (PAMLIBDIR, "pam_malcontent.so", NULL);
+    }
+
   /* Check the module can be loaded. */
   handle = dlopen (module_path, RTLD_NOW);
   g_assert_nonnull (handle);