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Or rather, we gave up on trying when specifying a custom spec path, which we need to do

I see, sorry I didn’t realize you were still blocked.

Like we can iterate and move forward, but it's not a complete solution

Also, I do have a workaround I can use, it just requires a rather inelegant hack in pom-resolve

custom spec for compiler would be problematic in the current build engine

generating a failure when you don’t specify the compiler in BUILD.tools and use custom looks doable…

Err sorry, I mean custom spec for the runtime

The problem is that in order to use a custom spec for the runtime, you have to use `'custom'`, which in turn means you can't use 2.11

Because `'custom'` selects the wrong compiler classpath for 2.11

I need to dig into it more though, in a meeting atm.

it should work as long as you define scalac, etc in BUILD.tools

It like, almost certainly does not.  See above

I don’t understand why you say it does not.

```  def compiler_classpath(self, products):
    """Return the proper classpath based on products and scala version."""
    compiler_name = scala_build_info.get(self._get_label()).compiler_name
    return self.tool_classpath_from_products(products, compiler_name, scope=self.options_scope)```

compiler name in this case would be scalac

I guess the question is whether `compiler_classpath` gets called if a custom one is defined

```  def compiler_classpath(self):
    return ScalaPlatform.global_instance().compiler_classpath(self.context.products)```

Yeah, there's no overriding that I can see going on

the overriding is just the way register_jvm_tools works

you specify a default and allow the user to override it.

the default I specified was 2.10 and if the target exists on the buildgraph that gets used…

since you set custom classpath returns the classpath for ‘//:scalac’ which if you have it defined on disk gets used