diff --git a/flake.nix b/flake.nix
index 63909265..ee2ddeb9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -69,6 +69,12 @@
             })
             (hfinal: hprev: lib.optionalAttrs (lib.versionOlder hprev.ghc.version "9.4") {
               time-domain = doJailbreak hprev.time-domain;
+              cabal-gild = null; # cabal-gild is only available from 9.4 onwards
+            })
+            (hfinal: hprev: lib.optionalAttrs (lib.versionOlder hprev.ghc.version "9.6") {
+              cabal-gild = doJailbreak hprev.cabal-gild;
+              fourmolu = doJailbreak hprev.fourmolu;
+              cabal-install = null; # Cannot rebuild cabal before 9.6
             })
             (hfinal: hprev: lib.optionalAttrs (lib.versionAtLeast hprev.ghc.version "9.10") {
               # Remove these as nixpkgs progresses!