diff --git a/gst-uninstalled.py b/gst-uninstalled.py
index 613c2d9654..cd11488a2c 100755
--- a/gst-uninstalled.py
+++ b/gst-uninstalled.py
@@ -81,6 +81,23 @@ def get_subprocess_env(options):
     for p in paths:
         prepend_env_var(env, 'PATH', p)
 
+    presets = set()
+    encoding_targets = set()
+    if '--installed' in subprocess.check_output([mesonintrospect, '-h']).decode():
+        installed_s = subprocess.check_output([sys.executable, mesonintrospect,
+                                               options.builddir, '--installed'])
+        for path, installpath in json.loads(installed_s.decode()).items():
+            if path.endswith('.prs'):
+                presets.add(os.path.dirname(path))
+            elif path.endswith('.gep'):
+                encoding_targets.add(
+                    os.path.abspath(os.path.join(os.path.dirname(path), '..')))
+        for p in presets:
+            prepend_env_var(env, 'GST_PRESET_PATH', p)
+
+        for t in encoding_targets:
+            prepend_env_var(env, 'GST_ENCODING_TARGET_PATH', t)
+
     return env