internal/pkg: check filtered error

This avoids filtering some unrelated os.ErrExist.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pkg/pkg.go

@@ -163,8 +163,12 @@ func (t *TContext) destroy(errP *error) {
 		if chmodErr != nil || removeErr != nil {
 			*errP = errors.Join(*errP, chmodErr, removeErr)
 		} else if errors.Is(*errP, os.ErrExist) {
-			// two artifacts may be backed by the same file
-			*errP = nil
+			var linkError *os.LinkError
+			if errors.As(*errP, &linkError) && linkError != nil &&
+				linkError.Op == "rename" {
+				// two artifacts may be backed by the same file
+				*errP = nil
+			}
 		}
 	}