diff --git a/flake.nix b/flake.nix
index e8581c2b82..e706997994 100644
--- a/flake.nix
+++ b/flake.nix
@@ -85,6 +85,7 @@
                 supportedGhcVersions = [ "928" ];
               })
               final.z3
+              final.secp256k1
             ];
           all-cabal-hashes = final.fetchurl {
             url =