Xcode import $PATH from bash

I want to import the bash

$PATH

environment variable (where it is set in

~/.bash_profile

) into one particular Xcode project (I'm using Xcode 11).

This is because I want to use a Makefile compile that Xcode project, and the Makefile uses the bash

PATH

environment variable. Specifically I use compilers and libraries that I installed using MacPorts, so I want Xcode to look in

/opt/local/bin:/opt/local/sbin

, like the Makefile does.

In Xcode I've tried adding these in

Edit scheme > Environment Variables

, and in

Build Settings

for both the project and its (external-build) target, as described in the answers to <a href="https://stackoverflow.com/questions/932424/where-is-path-set-in-xcode">this question</a>, but it hasn't appeared to have made a difference.

(The specific problem that I'm trying to fix is described in <a href="https://stackoverflow.com/questions/60920197/using-a-makefile-in-xcode-or-alternative-ide">my question here</a>.)

Can anyone help?