diff --git a/maintainers/scripts/haskell/hydra-report.hs b/maintainers/scripts/haskell/hydra-report.hs
index 6f154d90f06f..360b9f2058de 100755
--- a/maintainers/scripts/haskell/hydra-report.hs
+++ b/maintainers/scripts/haskell/hydra-report.hs
@@ -1,6 +1,6 @@
 #! /usr/bin/env nix-shell
 #! nix-shell -p "haskellPackages.ghcWithPackages (p: [p.aeson p.req])"
-#! nix-shell -p hydra_unstable
+#! nix-shell -p hydra-unstable
 #! nix-shell -i runhaskell
 
 {-