diff --git a/docs/conf.py b/docs/conf.py
index a5df3b8f1bf..a386b3550f5 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -219,13 +219,14 @@ graphviz_output_format = 'svg'
 # -- Options for hawkmoth -------------------------------------------------
 
 hawkmoth_root = os.path.abspath(os.pardir)
+mesa_root = os.path.join(os.path.dirname(__file__), os.pardir)
 hawkmoth_clang = [
-  '-Idocs/header-stubs/',
-  '-Iinclude/',
-  '-Isrc/',
-  '-Isrc/gallium/include/',
-  '-Isrc/intel/',
-  '-Isrc/mesa/',
+  '-I{}/docs/header-stubs/'.format(mesa_root),
+  '-I{}/include/'.format(mesa_root),
+  '-I{}/src/'.format(mesa_root),
+  '-I{}/src/gallium/include/'.format(mesa_root),
+  '-I{}/src/intel/'.format(mesa_root),
+  '-I{}/src/mesa/'.format(mesa_root),
   '-DHAVE_STRUCT_TIMESPEC',
   '-DHAVE_PTHREAD',
   '-DHAVE_ENDIAN_H',