diff --git a/build-waf.sh b/build-waf.sh
index 39996bc..3214f09 100755
--- a/build-waf.sh
+++ b/build-waf.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 TOOLS="msvs,clang_compilation_database,color_msvc"
-PRELUDE=$'\tsys.path.insert(0, \'scripts/waifulib\')'
+PRELUDE=$'\tsys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), \'scripts\', \'waifulib\'))'
 
 # a set of relatively stable tools
 # TODO: make it possible to override this list