diff --git a/hecl/extern/boo b/hecl/extern/boo
index 2135f4e4d..3e1da36f3 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 2135f4e4dc6ee7fa5a2b6398b97632dc5af9c822
+Subproject commit 3e1da36f390b4ddbc3a48977906c1f69f009614a
diff --git a/hecl/lib/Compilers.cpp b/hecl/lib/Compilers.cpp
index 67213f40b..c850c0094 100644
--- a/hecl/lib/Compilers.cpp
+++ b/hecl/lib/Compilers.cpp
@@ -177,7 +177,11 @@ struct ShaderCompiler<PlatformType::Metal> {
         close(compilerIn[1]);
 
         execlp("xcrun", "xcrun", "-sdk", "macosx", "metal", "-o", "/dev/stdout", "-Wno-unused-variable",
-               "-Wno-unused-const-variable", "-Wno-unused-function", "-c", "-x", "metal", "-", NULL);
+               "-Wno-unused-const-variable", "-Wno-unused-function", "-c", "-x", "metal",
+#ifndef NDEBUG
+               "-gline-tables-only", "-MO",
+#endif
+               "-", NULL);
         fprintf(stderr, "execlp fail %s\n", strerror(errno));
         exit(1);
       }