diff --git a/.envrc b/.envrc
index 3550a30f2de..8a73b1bfece 100644
--- a/.envrc
+++ b/.envrc
@@ -1 +1 @@
-use flake
+use flake . --accept-flake-config
diff --git a/flake.nix b/flake.nix
index 67013a34b38..5f16b0136b6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -176,13 +176,11 @@
   nixConfig = {
     extra-substituters = [
       "https://cache.iog.io"
-      "https://hydra-node.cachix.org"
       "https://cardano-scaling.cachix.org"
     ];
     extra-trusted-public-keys = [
       "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
-      "hydra-node.cachix.org-1:vK4mOEQDQKl9FTbq76NjOuNaRD4pZLxi1yri31HHmIw="
-      "cardano-scaling.cachix.org-1:RKvHKhGs/b6CBDqzKbDk0Rv6sod2kPSXLwPzcUQg9lY="
+      "cardano-scaling.cachix.org-1:QNK4nFrowZ/aIJMCBsE35m+O70fV6eewsBNdQnCSMKA="
     ];
     allow-import-from-derivation = true;
   };