diff --git a/pkgs/cosmos-2/default.nix b/pkgs/cosmos-2/default.nix
new file mode 100644
index 0000000..4caffb1
--- /dev/null
+++ b/pkgs/cosmos-2/default.nix
@@ -0,0 +1,146 @@
+{ lib }: {
+  buildWithPebble = { autoPatchelfHook, buildGoModule, srcRepo, commit ? null
+    , sdkRepo ? "cosmos/cosmos-sdk", chain, binary ? "${chain}d", version, meta
+    , disableGoWorkspace ? false }:
+    let
+      url = "https://github.com/${srcRepo}.git";
+      ref = "refs/tags/${version}";
+      src = (if !(commit == null) then
+        fetchGit {
+          inherit url ref;
+          rev = commit;
+        }
+      else
+        fetchGit { inherit url ref; });
+
+      def = rec {
+        inherit src version;
+
+        pname = "${chain}-cosmos3";
+
+        subPackages = [ "cmd/${binary}" ];
+
+        doCheck = false;
+
+        # Some repos fail to build with Go Workspaces being enabled.
+        # And also sometimes I just don't like when someone's telling me to go work.
+        GOWORK = if disableGoWorkspace then "off" else null;
+
+        # We don't check the tmpdir in the first stage because it usually
+        # needs to build some shared libraries. We get these shared
+        # libraries from the output of the first stage.
+        # The missing libraries should be caught by autoPatchelf.
+        noAuditTmpdir = true;
+
+        # tags = [ "pebbledb" ];
+
+        # ldflags = [
+        #   "-X github.com/${sdkRepo}/version.Name=${chain}"
+        #   "-X github.com/${sdkRepo}/version.ServerName=${chain}d"
+        #   "-X github.com/${sdkRepo}/version.Version=${version}"
+        #   # "-X github.com/cosmos/cosmos-sdk/types.DBBackend=pebbledb"
+        #   # "-X 'github.com/${sdkRepo}/version.BuildTags=netgo ledger,'"
+        # ] ++ (if !(commit == null) then
+        #   [ "-X github.com/${sdkRepo}/version.Commit=${src.rev}" ]
+        # else
+        #   [ ]);
+
+        ldflags = [
+          "-X github.com/${sdkRepo}/version.Name=${chain}"
+          "-X github.com/${sdkRepo}/version.ServerName=${chain}d"
+          "-X github.com/${sdkRepo}/version.Version=${version}"
+          # "-X 'github.com/${sdkRepo}/version.BuildTags=netgo ledger,'"
+        ] ++ (if !(commit == null) then
+          [ "-X github.com/${sdkRepo}/version.Commit=${src.rev}" ]
+        else
+          [ ]);
+
+        meta = with lib; {
+          description = meta.name;
+          homepage = "https://github.com/${srcRepo}.git";
+          mainProgram = binary;
+        };
+
+        # preBuild = ''
+        # renameImports = ''
+        #   go mod tidy
+        #   # go mod edit -require=github.com/ChorusOne/tm-db@v0.1.8-pebbledb
+        #   go mod edit -replace=github.com/tendermint/tm-db=github.com/ChorusOne/tm-db@v0.1.8-pebbledb
+        #   # go mod tidy
+        # '';
+
+        # overrideModAttrs = (old: {
+        preBuild = ''
+          echo %%% pre build
+          echo %%%
+          echo %%%
+          go mod download
+          go mod edit -replace=github.com/tendermint/tm-db=github.com/ChorusOne/tm-db@v0.1.8-pebbledb
+          go mod tidy
+          go mod download
+          echo %%%
+          echo %%%
+        '';
+
+        postBuild = ''
+          echo %%%
+          echo %%% post build
+          echo %%%
+          echo %%% this goModules: ${goModules}
+          echo %%%
+          echo %%%
+        '';
+
+        proxyVendor = true;
+
+        # vendorHash = "sha256-LrDi/rwLUUSjUTPUFokXe6pb3rBTHL2So1Eo0m64I00=";
+        # vendorHash = lib.fakeHash;
+        # vendorHash = "sha256-h8dKgsXZQ57qare6UhSjFXekHu9fE4S1245z41yQJt8=";
+        # vendorHash = "sha256-3gebktncaqYQ2yHunB1Br7PhvGzodYRo2aaRxZGslAY=";
+        vendorHash = "sha256-B+L8gITX89odCCoVmfSlF/zudBcZf3HvRimsBoy5PQg=";
+      };
+
+      base = buildGoModule def;
+      goModules = base.goModules;
+
+      patched = (def // rec {
+        nativeBuildInputs = [
+          # autoPatchelfHook
+        ];
+
+        # vendorHash = "sha256-3gebktncaqYQ2yHunB1Br7PhvGzodYRo2aaRxZGslAY=";
+        # vendorHash = lib.fakeHash;
+        # proxyVendor = true;
+
+        preBuild = ''
+          echo %%%
+          echo %%%
+          echo %%% ${./.}
+          echo %%% ${base}
+          echo %%% base.goModules: ${base.goModules}
+          echo %%% this goModules: ${goModules}
+          echo %%%
+          echo %%% patched pre build
+          echo %%%
+          echo %%%
+          echo %%%
+
+          # go mod edit -replace=github.com/tendermint/tm-db=github.com/ChorusOne/tm-db@v0.1.8-pebbledb
+          # go mod tidy
+
+          # addAutoPatchelfSearchPath ${base.goModules}/
+        '';
+
+        postBuild = ''
+          echo %%%
+          echo %%% post build
+          echo %%%
+          echo %%% this goModules: ${goModules}
+          echo %%%
+          echo %%%
+        '';
+      });
+
+    in buildGoModule patched;
+
+}
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 1ffca52..5d34a6e 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -2,6 +2,7 @@
 let callPackage = pkg: pkgs.callPackage pkg;
 in rec {
   cosmos = callPackage ./cosmos { };
+  cosmos2 = callPackage ./cosmos-2 { };
 
   cosmwasm-wasmvm = callPackage ./cosmwasm-wasmvm { };
 
@@ -121,4 +122,14 @@ in rec {
       vendorHash1 = "sha256-LrDi/rwLUUSjUTPUFokXe6pb3rBTHL2So1Eo0m64I00=";
       vendorHash2 = "sha256-3gebktncaqYQ2yHunB1Br7PhvGzodYRo2aaRxZGslAY=";
     };
+
+  sei-pebble-v2 = with pkgs;
+    cosmos2.buildWithPebble {
+      inherit autoPatchelfHook buildGoModule;
+
+      srcRepo = "sei-protocol/sei-chain";
+      chain = "sei";
+      version = "v3.3.0";
+      meta = { name = "Sei Chain"; };
+    };
 }