It works fine from psci, but when I try to use it from js side, I find toNullable Nothing produces undefined instead of null.
To reproduce:
$ psc --version
0.7.1.0
$ pulp init && pulp dep install purescript-nullable && pulp build
$ psc-bundle output/**/*.js -m Data.Nullable >test.js
$ echo "module.exports = PS;" >> test.js
$ node
> var PS = require("./test");
undefined
> PS["Data.Nullable"].toNullable( PS["Data.Maybe"].Nothing.value );
undefined