Docs fail to build

Building documentation for calls
ERROR: Error in gtkdoc helper script:

ERROR: ['gtkdoc-scan', '--module=calls', '--source-dir=/build/calls/src', '--source-dir=/build/calls/build/src', '--source-dir=/build/calls/build/libgdbofono', '--rebuild-types'] failed with status 1
Traceback (most recent call last):
  File "/nix/store/z1rm6dgvdmg54xs7njc3xf1vwpahiir2-gtk-doc-1.32/bin/gtkdoc-scan", line 59, in <module>
    scan.Run(options)
  File "/nix/store/z1rm6dgvdmg54xs7njc3xf1vwpahiir2-gtk-doc-1.32/share/gtk-doc/python/gtkdoc/scan.py", line 200, in Run
    ScanHeaders(dir, section_list, decl_list, get_types, seen_headers, options)
  File "/nix/store/z1rm6dgvdmg54xs7njc3xf1vwpahiir2-gtk-doc-1.32/share/gtk-doc/python/gtkdoc/scan.py", line 343, in ScanHeaders
    for file in sorted(os.listdir(source_dir)):
FileNotFoundError: [Errno 2] No such file or directory: '/build/calls/build/libgdbofono'

Likely caused by 460c0c6c but the trivial fix

--- a/doc/meson.build
+++ b/doc/meson.build
@@ -11,7 +11,7 @@
             src_dir: [
                        join_paths(meson.source_root(), 'src'),
                        join_paths(meson.build_root(), 'src'),
-                       join_paths(meson.build_root(), 'libgdbofono'),
+                       join_paths(meson.build_root(), 'plugins/ofono/libgdbofono'),
                      ],
        dependencies: calls_deps,
           scan_args: [

does not seem to help.