-- my-egg.egg

((synopsis "test egg")
 (dependencies srfi-4)
 (test-dependencies test)
 (components
   (extension
     my-egg
     (source my-egg.sld)))

--- my-egg.sld

(module my-egg *
  (import (chicken base) (srfi-4))

  (define foo u8vector))

--- set this environment

export CHICKEN_INSTALL_PREFIX=/tmp/venv/
export CHICKEN_INSTALL_REPOSITORY=/tmp/venv/
export CHICKEN_REPOSITORY_PATH=/tmp/venv/lib/chicken:/home/jeremy/.local/share/basket/5.4.0/lib/chicken/11
export PATH="/tmp/venv/bin:$PATH"

--- invocation

$ chicken-install salmonella
$ salmonella

$ git diff
diff --git a/salmonella.scm b/salmonella.scm
index c8981e5..9ae6ed7 100644
--- a/salmonella.scm
+++ b/salmonella.scm
@@ -218,7 +218,10 @@
                                  (maybe-exe "chicken-install")
                                  default-chicken-install-program))))
          (host-repository-path
-          (shell-command-output chicken-install '(-repository)))
+          (begin
+            ;; Get the repository path set at CHICKEN installation time
+            (unset-environment-variable! "CHICKEN_INSTALL_REPOSITORY")
+            (shell-command-output chicken-install '(-repository))))
          (binary-version (pathname-file host-repository-path))
          (major-version
           (let ((v (shell-command-output