diff --git a/build-constraints.yaml b/build-constraints.yaml
index e59f6b88..dcdac554 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -657,7 +657,6 @@ packages:
         - hledger-ui
         - hledger-web
         # - shelltestrunner
-        
 
     "Mihai Maruseac <mihai.maruseac@gmail.com>":
         - io-manager
@@ -1989,6 +1988,9 @@ package-flags:
     twitter-types:
         time15: true
 
+    darcs:
+        use-time-1point5: true
+
 # end of package-flags