diff --git a/make.bat b/make.bat
index 62e4694..12b8a86 100644
--- a/make.bat
+++ b/make.bat
@@ -8,7 +8,7 @@ if "%SPHINXBUILD%" == "" (
 	set SPHINXBUILD=sphinx-build
 )
 set SOURCEDIR=source
-set BUILDDIR=build
+set BUILDDIR=%SOURCEDIR%/build
 set SPHINXPROJ=Pybricks
 
 if "%1" == "" goto help