Make the post-build-hook also run for unresolved CA derivations

Fix #4837

tests/ca/post-hook.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+source common.sh
+
+sed -i 's/experimental-features .*/& ca-derivations ca-references nix-command flakes/' "$NIX_CONF_DIR"/nix.conf
+
+export NIX_TESTS_CA_BY_DEFAULT=1
+cd ..
+source ./post-hook.sh
+
+

tests/local.mk

@@ -39,6 +39,7 @@ nix_tests = \
   search.sh \
   nix-copy-ssh.sh \
   post-hook.sh \
+  ca/post-hook.sh \
   function-trace.sh \
   recursive.sh \
   describe-stores.sh \

tests/post-hook.sh

@@ -4,7 +4,7 @@ clearStore
 
 rm -f $TEST_ROOT/result
 
-export REMOTE_STORE=$TEST_ROOT/remote_store
+export REMOTE_STORE=file:$TEST_ROOT/remote_store
 
 # Build the dependencies and push them to the remote store
 nix-build -o $TEST_ROOT/result dependencies.nix --post-build-hook $PWD/push-to-store.sh