Replaced gnome.genmarshal() usage with explicit Meson custom_target() rules that generate both marshal.h and marshal.c from marshalers.list, preserving the same marshaller prefix and generated outputs consumed by the build.

Added a direct find_program() lookup for glib-genmarshal (with glib-genmarshal-2.0 fallback), so configuration no longer depends on the broken glib-2.0 pkg-config tool variable (glib_genmarshal) reported in your error.

src/common/meson.build

@@ -55,12 +55,39 @@ if host_machine.system() == 'windows'
   common_includes += include_directories('sysinfo')
 endif
 
-marshal = gnome.genmarshal('marshal',
-  sources: 'marshalers.list',
-  prefix: '_zoitechat_marshal',
-  internal: true
+glib_genmarshal = find_program(
+  'glib-genmarshal',
+  'glib-genmarshal-2.0',
+  required: true,
 )
 
+marshal = [
+  custom_target('marshal_h',
+    input: 'marshalers.list',
+    output: 'marshal.h',
+    command: [
+      glib_genmarshal,
+      '--prefix=_zoitechat_marshal',
+      '--header',
+      '@INPUT@',
+      '--output',
+      '@OUTPUT@',
+    ]
+  ),
+  custom_target('marshal_c',
+    input: 'marshalers.list',
+    output: 'marshal.c',
+    command: [
+      glib_genmarshal,
+      '--prefix=_zoitechat_marshal',
+      '--body',
+      '@INPUT@',
+      '--output',
+      '@OUTPUT@',
+    ]
+  )
+]
+
 make_te = find_program('make-te.py')
 
 textevents = custom_target('textevents',