Fix build hook error for libstore library users

A library shouldn't require changes to the caller's argument handling,
especially if it doesn't have to, and indeed we don't have to.

This changes the lookup order to prioritize the hardcoded path to nix
if it exists. The static executable still finds itself through /proc
and the like.

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/test-libstoreconsumer/README.md b/tests/test-libstoreconsumer/README.md
new file mode 100644
index 000000000..ded69850f
--- /dev/null
+++ b/tests/test-libstoreconsumer/README.md
@@ -0,0 +1,6 @@
+
+A very simple C++ consumer of the libstore library.
+
+  - Keep it simple. Library consumers expect something simple.
+  - No build hook, or any other reinvocations.
+  - No more global state than necessary.