Index: src/bindings/build.py
--- src/bindings/build.py.orig
+++ src/bindings/build.py
@@ -59,4 +59,4 @@ else:
     libraries = ["sodium"]
 
 # Set our source so that we can actually build our bindings to sodium.
-ffi.set_source("_sodium", "\n".join(source), libraries=libraries)
+ffi.set_source("_sodium", "\n".join(source), libraries=libraries, include_dirs=["${LOCALBASE}/include"])