This is copied from NixOS, which is under MIT licence.
https://github.com/NixOS/nixpkgs/blob/master/pkgs/desktops/gnome/misc/gpaste/
diff --git a/src/gnome-shell/extension.js b/src/gnome-shell/extension.js
index c8773fd6..9efbed67 100644
--- a/src/gnome-shell/extension.js
+++ b/src/gnome-shell/extension.js
@@ -6,6 +6,8 @@
 
 const Config = imports.misc.config;
 
+imports.gi.GIRepository.Repository.prepend_search_path('@typelibPath@');
+
 imports.gi.versions.Clutter = Config.LIBMUTTER_API_VERSION;
 imports.gi.versions.GLib = '2.0';
 imports.gi.versions.GPaste = '2';
diff --git a/src/gnome-shell/prefs.js b/src/gnome-shell/prefs.js
index 32244ab2..74b85572 100644
--- a/src/gnome-shell/prefs.js
+++ b/src/gnome-shell/prefs.js
@@ -6,6 +6,8 @@
 
 imports.gi.versions.GPasteGtk = '4';
 
+imports.gi.GIRepository.Repository.prepend_search_path('@typelibPath@');
+
 const ExtensionUtils = imports.misc.extensionUtils;
 
 const { GPasteGtk } = imports.gi;
diff --git a/src/libgpaste/gpaste/gpaste-settings.c b/src/libgpaste/gpaste/gpaste-settings.c
index 7e53eb64..57c399fc 100644
--- a/src/libgpaste/gpaste/gpaste-settings.c
+++ b/src/libgpaste/gpaste/gpaste-settings.c
@@ -1013,7 +1013,11 @@ create_g_settings (void)
     }
     else
     {
-        return g_settings_new (G_PASTE_SETTINGS_NAME);
+        // library used by introspection requires schemas but we cannot set XDG_DATA_DIRS for the library
+        GSettingsSchemaSource *schema_source = g_settings_schema_source_new_from_directory ("@gschemasCompiled@", NULL, FALSE, NULL);
+        g_autoptr (GSettingsSchema) schema = g_settings_schema_source_lookup (schema_source, G_PASTE_SETTINGS_NAME, FALSE);
+        g_settings_schema_source_unref (schema_source);
+        return g_settings_new_full (schema, NULL, NULL);
     }
 }
 
'>committer</option>
<option value='range'>range</option>
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<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
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</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=b00b251594561b6536a629e3af40074938de476a'>root</a>/<a href='/guix/log/po?id=b00b251594561b6536a629e3af40074938de476a'>po</a>/<a href='/guix/log/po/packages?id=b00b251594561b6536a629e3af40074938de476a'>packages</a>/<a href='/guix/log/po/packages/de.po?id=b00b251594561b6536a629e3af40074938de476a'>de.po</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/po/packages/de.po?id=b00b251594561b6536a629e3af40074938de476a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-05-31 17:23:21 +0200'>2023-05-31</span></td><td><a href='/guix/commit/po/packages/de.po?id=8e9e6a6482f3ba98d1cdcad344ee488e8751fee7'>nls: Update translations.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/guix-cookbook.texi (Top): Mention Slovak.
</span></span></td><td>Florian Pelz</td></tr>
<tr><td><span title='2023-03-07 21:14:57 +0100'>2023-03-07</span></td><td><a href='/guix/commit/po/packages/de.po?id=d333958763b0840c4cd895601b079b68358a6a46'>nls: Update translations.</a></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-12-04 22:25:23 +0100'>2022-12-04</span></td><td><a href='/guix/commit/po/packages/de.po?id=2e75b328b6bbdadbffe5b643a4891b5026a0defd'>nls: Update translations.</a><span class='msg-avail'>...<span class='msg-tooltip'>po/packages/vi.po: New file.
po/packages/LINGUAS: Add it.
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-11-04 10:56:38 +0100'>2022-11-04</span></td><td><a href='/guix/commit/po/packages/de.po?id=a65ce9dd500460af4f97e7398fb35dd817f4c677'>nls: Update translations.</a><span class='msg-avail'>...<span class='msg-tooltip'>* po/guix/lt.po: New file.
* po/guix/LINGUAS: Add lt.
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-10-06 08:20:20 +0200'>2022-10-06</span></td><td><a href='/guix/commit/po/packages/de.po?id=70fc8f6d619ce9f16a8cc0bbb10a011bd3a9997a'>nls: Update translations.</a></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-09-04 16:52:02 +0200'>2022-09-04</span></td><td><a href='/guix/commit/po/packages/de.po?id=77e3042aef6d8e519d016555464e466399318b4f'>nls: Update translations.</a></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-08-10 23:32:24 +0200'>2022-08-10</span></td><td><a href='/guix/commit/po/packages/de.po?id=aacbe59fbceb8a93ecb68fed8581dfdd70dafc11'>nls: Update translations.</a><span class='msg-avail'>...<span class='msg-tooltip'>po/guix/bn.po: New file.
po/guix/LINGUAS: Add it.
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-07-09 21:49:34 +0200'>2022-07-09</span></td><td><a href='/guix/commit/po/packages/de.po?id=e0d47d8facafb6d6c04741bbf30eefbc68aaefb9'>nls: Update translations.</a><span class='msg-avail'>...<span class='msg-tooltip'>po/guix/tr.po: New file.
po/guix/LINGUAS: Add it.
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-06-04 17:42:54 +0200'>2022-06-04</span></td><td><a href='/guix/commit/po/packages/de.po?id=809c57c872a6dd48007d1abf6d7f3dd1482ec53a'>nls: Update translations.</a><span class='msg-avail'>...<span class='msg-tooltip'>po/packages/tr.po: New file.
po/packages/LINGUAS: Add it.
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-05-01 18:07:34 +0200'>2022-05-01</span></td><td><a href='/guix/commit/po/packages/de.po?id=6b4124cdcc203d47dc40158062afa1497d73d592'>nls: Update translations.</a><span class='msg-avail'>...<span class='msg-tooltip'>po/guix/ja.po: New file.
po/guix/LINGUAS: Add it.
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-04-02 18:42:36 +0200'>2022-04-02</span></td><td><a href='/guix/commit/po/packages/de.po?id=8a208df17fe81fbf34f5a86cc52bb0b8e33c7b96'>nls: Update translations.</a><span class='msg-avail'>...<span class='msg-tooltip'>* po/packages/fi.po: New file.
* po/packages/LINGUAS: Add it.
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2022-03-01 22:17:18 +0100'>2022-03-01</span></td><td><a href='/guix/commit/po/packages/de.po?id=8c92d85e06e65c5cdb5f6c75faf8aa33e5a68513'>nls: Update translations.</a><span class='msg-avail'>...<span class='msg-tooltip'>* po/doc/guix-cookbook.uk.po: New file.
* po/doc/local.mk: Add uk cookbook.
* doc/local.mk: Add uk cookbook.
* po/guix/fa.po: New file.
* po/guix/uk.po: New file.
* po/guix/LINGUAS: Add fa and uk.
</span></span></td><td>Julien Lepiller</td></tr>