gEDA-user: How do I reference a shell variable from guile script?

[Dave N6NZ <n6nz@xxxxxxxx>]

Suppose I want to build a path like: $HOME/<path>/gedasymbols to pick up component libraries, without unrolling $HOME into a hard path in a (define..) -- how do I get guile to pick up the value of $HOME from the shell, and then get it pasted into the rest of the stuff?

I'm aiming for:
(define gedasymbols <path built off $HOME>)
(component-library (build-path gedasymbols "foo"))

TIA
-dave



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