diff --git a/install/shake.yaml b/install/shake.yaml
index 17b5d4abc..629cd0d81 100644
--- a/install/shake.yaml
+++ b/install/shake.yaml
@@ -13,6 +13,7 @@ extra-deps:
 - shake-0.18.5
 # for resolvers with ghc < 8.6
 # - shake-0.17
+- unix-time-0.4.7
 
 
 nix: