Allow paths in flake local settings

Fix #5505

1 files changed, 12 insertions, 2 deletions

diff --git a/tests/flake-local-settings.sh b/tests/flake-local-settings.sh
index 98ad60174..7765fe379 100644
--- a/tests/flake-local-settings.sh
+++ b/tests/flake-local-settings.sh
@@ -11,13 +11,13 @@ rm -f post-hook-ran
 cat <<EOF > echoing-post-hook.sh
 #!/bin/sh
 
-echo "ThePostHookRan" > $PWD/post-hook-ran
+echo "ThePostHookRan as \$0" > $PWD/post-hook-ran
 EOF
 chmod +x echoing-post-hook.sh
 
 cat <<EOF > flake.nix
 {
-    nixConfig.post-build-hook = "$PWD/echoing-post-hook.sh";
+    nixConfig.post-build-hook = ./echoing-post-hook.sh;
     nixConfig.allow-dirty = false; # See #5621
 
     outputs = a: {
@@ -33,3 +33,13 @@ clearStore
 
 nix build --accept-flake-config
 test -f post-hook-ran || fail "The post hook should have ran"
+
+# Make sure that the path to the post hook doesn’t change if we change
+# something in the flake.
+# Otherwise the user would have to re-validate the setting each time.
+mv post-hook-ran previous-post-hook-run
+echo "# Dummy comment" >> flake.nix
+clearStore
+nix build --accept-flake-config
+diff -q post-hook-ran previous-post-hook-run || \
+    fail "Both post hook runs should report the same filename"