diff --git a/flake.lock b/flake.lock
index 451785e22c..e6c1782cb1 100644
--- a/flake.lock
+++ b/flake.lock
@@ -56,16 +56,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1682584936,
-        "narHash": "sha256-WM3Ww2o/86MBaPvWTCaAKlfZsgPc2onD/BIpCW3ecG0=",
+        "lastModified": 1708053705,
+        "narHash": "sha256-K6kCu54cOM3zSUkVmfB9zPqWyKFpEkMkDLbRl9sxES4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e190995db93b479d4b8f2a5b115f7a60214e7215",
+        "rev": "0ed7136921ea094c771db674c9d2566b14852a01",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "release-22.11",
+        "ref": "release-23.11",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 861d116d38..49ece2e61b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,6 +1,6 @@
 {
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/release-22.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/release-23.11";
     flake-utils.url = "github:numtide/flake-utils";
     nix-bundle-exe = {
       url = "github:3noch/nix-bundle-exe";
diff --git a/go.mod b/go.mod
index 4f1ce9f354..a69cdddf88 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/crypto-org-chain/cronos/v2
 
-go 1.20
+go 1.21
 
 require (
 	cosmossdk.io/api v0.3.1
diff --git a/integration_tests/poetry.lock b/integration_tests/poetry.lock
index a35fc72cd5..ddfddffd50 100644
--- a/integration_tests/poetry.lock
+++ b/integration_tests/poetry.lock
@@ -653,22 +653,21 @@ tomli = "*"
 
 [[package]]
 name = "flake8-isort"
-version = "4.1.1"
-description = "flake8 plugin that integrates isort ."
+version = "6.1.1"
+description = "flake8 plugin that integrates isort"
 optional = false
-python-versions = "*"
+python-versions = ">=3.8"
 files = [
-    {file = "flake8-isort-4.1.1.tar.gz", hash = "sha256:d814304ab70e6e58859bc5c3e221e2e6e71c958e7005239202fee19c24f82717"},
-    {file = "flake8_isort-4.1.1-py3-none-any.whl", hash = "sha256:c4e8b6dcb7be9b71a02e6e5d4196cefcef0f3447be51e82730fb336fff164949"},
+    {file = "flake8_isort-6.1.1-py3-none-any.whl", hash = "sha256:0fec4dc3a15aefbdbe4012e51d5531a2eb5fa8b981cdfbc882296a59b54ede12"},
+    {file = "flake8_isort-6.1.1.tar.gz", hash = "sha256:c1f82f3cf06a80c13e1d09bfae460e9666255d5c780b859f19f8318d420370b3"},
 ]
 
 [package.dependencies]
-flake8 = ">=3.2.1,<5"
-isort = ">=4.3.5,<6"
-testfixtures = ">=6.8.0,<7"
+flake8 = "*"
+isort = ">=5.0.0,<6"
 
 [package.extras]
-test = ["pytest-cov"]
+test = ["pytest"]
 
 [[package]]
 name = "flake8-polyfill"
@@ -894,20 +893,17 @@ requests = ">=2.11"
 
 [[package]]
 name = "isort"
-version = "5.10.1"
+version = "5.13.2"
 description = "A Python utility / library to sort Python imports."
 optional = false
-python-versions = ">=3.6.1,<4.0"
+python-versions = ">=3.8.0"
 files = [
-    {file = "isort-5.10.1-py3-none-any.whl", hash = "sha256:6f62d78e2f89b4500b080fe3a81690850cd254227f27f75c3a0c491a1f351ba7"},
-    {file = "isort-5.10.1.tar.gz", hash = "sha256:e8443a5e7a020e9d7f97f1d7d9cd17c88bcb3bc7e218bf9cf5095fe550be2951"},
+    {file = "isort-5.13.2-py3-none-any.whl", hash = "sha256:8ca5e72a8d85860d5a3fa69b8745237f2939afe12dbf656afbcb47fe72d947a6"},
+    {file = "isort-5.13.2.tar.gz", hash = "sha256:48fdfcb9face5d58a4f6dde2e72a1fb8dcaf8ab26f95ab49fab84c2ddefb0109"},
 ]
 
 [package.extras]
-colors = ["colorama (>=0.4.3,<0.5.0)"]
-pipfile-deprecated-finder = ["pipreqs", "requirementslib"]
-plugins = ["setuptools"]
-requirements-deprecated-finder = ["pip-api", "pipreqs"]
+colors = ["colorama (>=0.4.6)"]
 
 [[package]]
 name = "jsonmerge"
@@ -954,14 +950,97 @@ format-nongpl = ["fqdn", "idna", "isoduration", "jsonpointer (>1.13)", "rfc3339-
 
 [[package]]
 name = "lru-dict"
-version = "1.1.7"
+version = "1.3.0"
 description = "An Dict like LRU container."
 optional = false
-python-versions = "*"
+python-versions = ">=3.8"
 files = [
-    {file = "lru-dict-1.1.7.tar.gz", hash = "sha256:45b81f67d75341d4433abade799a47e9c42a9e22a118531dcb5e549864032d7c"},
+    {file = "lru-dict-1.3.0.tar.gz", hash = "sha256:54fd1966d6bd1fcde781596cb86068214edeebff1db13a2cea11079e3fd07b6b"},
+    {file = "lru_dict-1.3.0-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:4073333894db9840f066226d50e6f914a2240711c87d60885d8c940b69a6673f"},
+    {file = "lru_dict-1.3.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:0ad6361e4dd63b47b2fc8eab344198f37387e1da3dcfacfee19bafac3ec9f1eb"},
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+    {file = "lru_dict-1.3.0-pp310-pypy310_pp73-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:e5c20f236f27551e3f0adbf1a987673fb1e9c38d6d284502cd38f5a3845ef681"},
+    {file = "lru_dict-1.3.0-pp310-pypy310_pp73-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:ca3703ff03b03a1848c563bc2663d0ad813c1cd42c4d9cf75b623716d4415d9a"},
+    {file = "lru_dict-1.3.0-pp310-pypy310_pp73-win_amd64.whl", hash = "sha256:a9fb71ba262c6058a0017ce83d343370d0a0dbe2ae62c2eef38241ec13219330"},
+    {file = "lru_dict-1.3.0-pp38-pypy38_pp73-macosx_10_9_x86_64.whl", hash = "sha256:f5b88a7c39e307739a3701194993455968fcffe437d1facab93546b1b8a334c1"},
+    {file = "lru_dict-1.3.0-pp38-pypy38_pp73-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:2682bfca24656fb7a643621520d57b7fe684ed5fa7be008704c1235d38e16a32"},
+    {file = "lru_dict-1.3.0-pp38-pypy38_pp73-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:96fc87ddf569181827458ec5ad8fa446c4690cffacda66667de780f9fcefd44d"},
+    {file = "lru_dict-1.3.0-pp38-pypy38_pp73-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:dcec98e2c7da7631f0811730303abc4bdfe70d013f7a11e174a2ccd5612a7c59"},
+    {file = "lru_dict-1.3.0-pp38-pypy38_pp73-win_amd64.whl", hash = "sha256:6bba2863060caeaedd8386b0c8ee9a7ce4d57a7cb80ceeddf440b4eff2d013ba"},
+    {file = "lru_dict-1.3.0-pp39-pypy39_pp73-macosx_10_9_x86_64.whl", hash = "sha256:3c497fb60279f1e1d7dfbe150b1b069eaa43f7e172dab03f206282f4994676c5"},
+    {file = "lru_dict-1.3.0-pp39-pypy39_pp73-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:8d9509d817a47597988615c1a322580c10100acad10c98dfcf3abb41e0e5877f"},
+    {file = "lru_dict-1.3.0-pp39-pypy39_pp73-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:0213ab4e3d9a8d386c18e485ad7b14b615cb6f05df6ef44fb2a0746c6ea9278b"},
+    {file = "lru_dict-1.3.0-pp39-pypy39_pp73-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:b50fbd69cd3287196796ab4d50e4cc741eb5b5a01f89d8e930df08da3010c385"},
+    {file = "lru_dict-1.3.0-pp39-pypy39_pp73-win_amd64.whl", hash = "sha256:5247d1f011f92666010942434020ddc5a60951fefd5d12a594f0e5d9f43e3b3b"},
 ]
 
+[package.extras]
+test = ["pytest"]
+
 [[package]]
 name = "mccabe"
 version = "0.6.1"
@@ -1383,8 +1462,8 @@ tomlkit = "^0.7.0"
 [package.source]
 type = "git"
 url = "https://github.com/crypto-com/pystarport.git"
-reference = "39ecbd29fcdd50cb3015524c13755fda05bdf23d"
-resolved_reference = "39ecbd29fcdd50cb3015524c13755fda05bdf23d"
+reference = "403b845"
+resolved_reference = "403b84548623d8139082689e38a7a786efa1d3ac"
 
 [[package]]
 name = "pytest"
@@ -1647,22 +1726,6 @@ files = [
     {file = "termcolor-1.1.0.tar.gz", hash = "sha256:1d6d69ce66211143803fbc56652b41d73b4a400a2891d7bf7a1cdf4c02de613b"},
 ]
 
-[[package]]
-name = "testfixtures"
-version = "6.18.5"
-description = "A collection of helpers and mock objects for unit tests and doc tests."
-optional = false
-python-versions = "*"
-files = [
-    {file = "testfixtures-6.18.5-py2.py3-none-any.whl", hash = "sha256:7de200e24f50a4a5d6da7019fb1197aaf5abd475efb2ec2422fdcf2f2eb98c1d"},
-    {file = "testfixtures-6.18.5.tar.gz", hash = "sha256:02dae883f567f5b70fd3ad3c9eefb95912e78ac90be6c7444b5e2f46bf572c84"},
-]
-
-[package.extras]
-build = ["setuptools-git", "twine", "wheel"]
-docs = ["django", "django (<2)", "mock", "sphinx", "sybil", "twisted", "zope.component"]
-test = ["django", "django (<2)", "mock", "pytest (>=3.6)", "pytest-cov", "pytest-django", "sybil", "twisted", "zope.component"]
-
 [[package]]
 name = "toml"
 version = "0.10.2"
@@ -1953,4 +2016,4 @@ testing = ["func-timeout", "jaraco.itertools", "pytest (>=6)", "pytest-black (>=
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "d61d73ac475c7c53d42477873b678d71abe1091d1c448e65eb61bae48843197a"
+content-hash = "0d32f399fc5d6d3118b9c7df963b4c5593111eca97aa838129d86dd1c96022e4"
diff --git a/integration_tests/pyproject.toml b/integration_tests/pyproject.toml
index 91c0aed2ed..14b80f7153 100644
--- a/integration_tests/pyproject.toml
+++ b/integration_tests/pyproject.toml
@@ -11,7 +11,7 @@ pytest-github-actions-annotate-failures = "^0.1.1"
 flake8 = "^4.0.1"
 black = "^22.3.0"
 flake8-black = "^0.3.2"
-flake8-isort = "^4.1.1"
+flake8-isort = "^6.1.1"
 pep8-naming = "^0.11.1"
 protobuf = "^3.13.0"
 grpcio = "^1.53.2"
@@ -20,7 +20,7 @@ python-dateutil = "^2.8.1"
 web3 = "^6.0.0b6"
 eth-bloom = "^1.0.4"
 python-dotenv = "^0.19.2"
-pystarport = { git = "https://github.com/crypto-com/pystarport.git", branch = "main", rev = "39ecbd29fcdd50cb3015524c13755fda05bdf23d" }
+pystarport = { git = "https://github.com/crypto-com/pystarport.git", branch = "main", rev = "403b845" }
 websockets = "^10.3"
 toml = "^0.10.2"
 pysha3 = "^1.0.2"
@@ -33,5 +33,5 @@ flaky = "^3.7.0"
 [tool.poetry.dev-dependencies]
 
 [build-system]
-requires = ["poetry>=0.12"]
-build-backend = "poetry.masonry.api"
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
diff --git a/integration_tests/shell.nix b/integration_tests/shell.nix
index 25eb185fe3..fe275138a5 100644
--- a/integration_tests/shell.nix
+++ b/integration_tests/shell.nix
@@ -10,7 +10,6 @@ pkgs.mkShell {
     (pkgs.callPackage ../. { coverage = true; }) # cronosd
     pkgs.start-scripts
     pkgs.go-ethereum
-    pkgs.gorc
     pkgs.cosmovisor
     pkgs.poetry
     pkgs.nodejs
diff --git a/nix/build_overlay.nix b/nix/build_overlay.nix
index 6875e06dc0..476654e669 100644
--- a/nix/build_overlay.nix
+++ b/nix/build_overlay.nix
@@ -1,15 +1,4 @@
 # some basic overlays nessesary for the build
 final: super: {
-  # include the fix: https://github.com/NixOS/nixpkgs/pull/211515
-  zstd = final.callPackage ./zstd.nix {
-    cmake = final.buildPackages.cmakeMinimal;
-  };
   rocksdb = final.callPackage ./rocksdb.nix { };
-  go_1_20 = super.go_1_20.overrideAttrs (prev: rec {
-    version = "1.20.4";
-    src = final.fetchurl {
-      url = "https://go.dev/dl/go${version}.src.tar.gz";
-      hash = "sha256-nzSs4Sh2S3o6SyOLgFhWzBshhDBN+eVpCCWwcQ9CAtY=";
-    };
-  });
 }
diff --git a/nix/default.nix b/nix/default.nix
index 87203b0fa8..82383bcb6f 100644
--- a/nix/default.nix
+++ b/nix/default.nix
@@ -13,6 +13,7 @@ import sources.nixpkgs {
       flake-compat = import sources.flake-compat;
       chain-maind = pkgs.callPackage sources.chain-main { rocksdb = null; };
     }) # update to a version that supports eip-1559
+    (import "${sources.poetry2nix}/overlay.nix")
     (import "${sources.gomod2nix}/overlay.nix")
     (pkgs: _:
       import ./scripts.nix {
@@ -43,11 +44,11 @@ import sources.nixpkgs {
     })
     (_: pkgs: { test-env = pkgs.callPackage ./testenv.nix { }; })
     (_: pkgs: {
-      cosmovisor = pkgs.buildGo118Module rec {
+      cosmovisor = pkgs.buildGo120Module rec {
         name = "cosmovisor";
         src = sources.cosmos-sdk + "/cosmovisor";
         subPackages = [ "./cmd/cosmovisor" ];
-        vendorSha256 = "sha256-OAXWrwpartjgSP7oeNvDJ7cTR9lyYVNhEM8HUnv3acE=";
+        vendorHash = "sha256-OAXWrwpartjgSP7oeNvDJ7cTR9lyYVNhEM8HUnv3acE=";
         doCheck = false;
       };
     })
@@ -56,7 +57,7 @@ import sources.nixpkgs {
         name = "rly";
         src = sources.relayer;
         subPackages = [ "." ];
-        vendorSha256 = "sha256-5s5URiAZk59mOfZdUcqYAB/IvzFuBiQH5jDBuh6huTE=";
+        vendorHash = "sha256-5s5URiAZk59mOfZdUcqYAB/IvzFuBiQH5jDBuh6huTE=";
         doCheck = false;
         GOWORK = "off";
         postInstall = ''
diff --git a/nix/go-ethereum.nix b/nix/go-ethereum.nix
index 560ef62131..b8651acaf1 100644
--- a/nix/go-ethereum.nix
+++ b/nix/go-ethereum.nix
@@ -19,7 +19,7 @@ buildGoModule rec {
     sha256 = "sha256-mZ11xan3MGgaUORbiQczKrXSrxzjvQMhZbpHnEal11Y=";
   };
 
-  vendorSha256 = "sha256-rjSGR2ie5sFK2OOo4HUZ6+hrDlQuUDtyTKn0sh8jFBY=";
+  vendorHash = "sha256-rjSGR2ie5sFK2OOo4HUZ6+hrDlQuUDtyTKn0sh8jFBY=";
 
   doCheck = false;
 
diff --git a/nix/sources.json b/nix/sources.json
index 2d500d2127..4146dc75df 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -5,10 +5,10 @@
         "homepage": "https://crypto.org",
         "owner": "crypto-org-chain",
         "repo": "chain-main",
-        "rev": "02455a4eafa8f2f6e4bd4aa9886904cfd3d518aa",
-        "sha256": "0ndlld82xw5004ma97ap6z6vhfsbkcma8yhvw891l3bf98rfllgk",
+        "rev": "04e8e094b7d51a8cf92b74c789394b7b34987b10",
+        "sha256": "1yqd2i8dwphjhdsvl3v7l8gvrjjl6i6pj4nq58lwcf3s6nhwy6d5",
         "type": "tarball",
-        "url": "https://github.com/crypto-org-chain/chain-main/archive/02455a4eafa8f2f6e4bd4aa9886904cfd3d518aa.tar.gz",
+        "url": "https://github.com/crypto-org-chain/chain-main/archive/04e8e094b7d51a8cf92b74c789394b7b34987b10.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "cosmos-sdk": {
@@ -97,15 +97,27 @@
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {
-        "branch": "master",
+        "branch": "release-23.11",
         "description": "Nix Packages collection",
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "90aa73fc8e1550b16d1ebdc436e48d9951f7989b",
-        "sha256": "0jh4npbcqjlszhnaz5mkziv5g1p5ig6wqp68yjxkjllsc7vhsrw6",
+        "rev": "0ca77ade2a34c5466be6d54f1267507860c95da8",
+        "sha256": "11q88xx5njl31h3qrc213qx43yi9fqlfrbfwv2h5dgamgbpp2jk9",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/0ca77ade2a34c5466be6d54f1267507860c95da8.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "poetry2nix": {
+        "branch": "master",
+        "description": "Convert poetry projects to nix automagically [maintainer=@adisbladis] ",
+        "homepage": "",
+        "owner": "nix-community",
+        "repo": "poetry2nix",
+        "rev": "4eb2ac54029af42a001c9901194e9ce19cbd8a40",
+        "sha256": "16fi71fpywiqsya1z99kkb14dansyrmkkrb2clzs3b5qqx673wf4",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/90aa73fc8e1550b16d1ebdc436e48d9951f7989b.tar.gz",
+        "url": "https://github.com/nix-community/poetry2nix/archive/4eb2ac54029af42a001c9901194e9ce19cbd8a40.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "relayer": {
diff --git a/nix/testenv.nix b/nix/testenv.nix
index e951eccb7f..092e4337ec 100644
--- a/nix/testenv.nix
+++ b/nix/testenv.nix
@@ -7,12 +7,13 @@ poetry2nix.mkPoetryEnv {
       let
         buildSystems = {
           eth-bloom = [ "setuptools" ];
-          pystarport = [ "poetry" ];
+          pystarport = [ "poetry-core" ];
           cprotobuf = [ "setuptools" ];
           durations = [ "setuptools" ];
           multitail2 = [ "setuptools" ];
           pytest-github-actions-annotate-failures = [ "setuptools" ];
           flake8-black = [ "setuptools" ];
+          flake8-isort = [ "hatchling" ];
           multiaddr = [ "setuptools" ];
         };
       in
diff --git a/nix/zstd.nix b/nix/zstd.nix
deleted file mode 100644
index ff88600568..0000000000
--- a/nix/zstd.nix
+++ /dev/null
@@ -1,122 +0,0 @@
-{ lib
-, stdenv
-, fetchFromGitHub
-, cmake
-, bash
-, gnugrep
-, fixDarwinDylibNames
-, file
-, fetchpatch
-, legacySupport ? false
-, static ? stdenv.hostPlatform.isStatic
-  # these need to be ran on the host, thus disable when cross-compiling
-, buildContrib ? stdenv.hostPlatform == stdenv.buildPlatform
-, doCheck ? stdenv.hostPlatform == stdenv.buildPlatform
-, nix-update-script
-}:
-
-stdenv.mkDerivation rec {
-  pname = "zstd";
-  version = "1.5.2";
-
-  src = fetchFromGitHub {
-    owner = "facebook";
-    repo = "zstd";
-    rev = "v${version}";
-    sha256 = "sha256-yJvhcysxcbUGuDOqe/TQ3Y5xyM2AUw6r1THSHOqmUy0=";
-  };
-
-  nativeBuildInputs = [ cmake ]
-    ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
-  buildInputs = lib.optional stdenv.hostPlatform.isUnix bash;
-
-  patches = [
-    # This patches makes sure we do not attempt to use the MD5 implementation
-    # of the host platform when running the tests
-    ./playtests-darwin.patch
-  ];
-
-  postPatch = lib.optionalString (!static) ''
-    substituteInPlace build/cmake/CMakeLists.txt \
-      --replace 'message(SEND_ERROR "You need to build static library to build tests")' ""
-    substituteInPlace build/cmake/tests/CMakeLists.txt \
-      --replace 'libzstd_static' 'libzstd_shared'
-    sed -i \
-      "1aexport ${lib.optionalString stdenv.isDarwin "DY"}LD_LIBRARY_PATH=$PWD/build_/lib" \
-      tests/playTests.sh
-  '';
-
-  LDFLAGS = lib.optionalString stdenv.hostPlatform.isRiscV "-latomic";
-
-  cmakeFlags = lib.attrsets.mapAttrsToList
-    (name: value: "-DZSTD_${name}:BOOL=${if value then "ON" else "OFF"}")
-    {
-      BUILD_SHARED = !static;
-      BUILD_STATIC = static;
-      BUILD_CONTRIB = buildContrib;
-      PROGRAMS_LINK_SHARED = !static;
-      LEGACY_SUPPORT = legacySupport;
-      BUILD_TESTS = doCheck;
-    };
-
-  cmakeDir = "../build/cmake";
-  dontUseCmakeBuildDir = true;
-  preConfigure = ''
-    mkdir -p build_ && cd $_
-  '';
-
-  checkInputs = [ file ];
-  inherit doCheck;
-  checkPhase = ''
-    runHook preCheck
-    # Patch shebangs for playTests
-    patchShebangs ../programs/zstdgrep
-    ctest -R playTests # The only relatively fast test.
-    runHook postCheck
-  '';
-
-  preInstall = ''
-    mkdir -p $bin/bin
-    substituteInPlace ../programs/zstdgrep \
-      --replace ":-grep" ":-${gnugrep}/bin/grep" \
-      --replace ":-zstdcat" ":-$bin/bin/zstdcat"
-
-    substituteInPlace ../programs/zstdless \
-      --replace "zstdcat" "$bin/bin/zstdcat"
-  '' + lib.optionalString buildContrib (
-    ''
-      cp contrib/pzstd/pzstd $bin/bin/pzstd
-    '' + lib.optionalString stdenv.isDarwin ''
-      install_name_tool -change @rpath/libzstd.1.dylib $out/lib/libzstd.1.dylib $bin/bin/pzstd
-    ''
-  );
-
-  outputs = [ "bin" "dev" ]
-    ++ lib.optional stdenv.hostPlatform.isUnix "man"
-    ++ [ "out" ];
-
-  passthru = {
-    updateScript = nix-update-script {
-      attrPath = pname;
-    };
-  };
-
-  meta = with lib; {
-    description = "Zstandard real-time compression algorithm";
-    longDescription = ''
-      Zstd, short for Zstandard, is a fast lossless compression algorithm,
-      targeting real-time compression scenarios at zlib-level compression
-      ratio. Zstd can also offer stronger compression ratio at the cost of
-      compression speed. Speed/ratio trade-off is configurable by small
-      increment, to fit different situations. Note however that decompression
-      speed is preserved and remain roughly the same at all settings, a
-      property shared by most LZ compression algorithms, such as zlib.
-    '';
-    homepage = "https://facebook.github.io/zstd/";
-    changelog = "https://github.com/facebook/zstd/blob/v${version}/CHANGELOG";
-    license = with licenses; [ bsd3 ]; # Or, at your opinion, GPL-2.0-only.
-
-    platforms = platforms.all;
-    maintainers = with maintainers; [ orivej ];
-  };
-}