diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1ba9fc5d..0cbdc0fe 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2610,9 +2610,6 @@ package-flags:
     nix-paths:
         allow-relative-paths: true
 
-    darcs:
-        use-time-1point5: true
-
     fay:
         test: true