diff --git a/pkgs/by-name/pa/pacu/package.nix b/pkgs/by-name/pa/pacu/package.nix
index 91122b15a79d..78491c24c697 100644
--- a/pkgs/by-name/pa/pacu/package.nix
+++ b/pkgs/by-name/pa/pacu/package.nix
@@ -1,17 +1,16 @@
-{ lib
-, awscli
-, fetchFromGitHub
-, python3
+{
+  lib,
+  awscli,
+  fetchFromGitHub,
+  python3,
 }:
 
-
 let
   python = python3.override {
-    packageOverrides = self: super: {
-      sqlalchemy = super.sqlalchemy_1_4;
-    };
+    packageOverrides = self: super: { sqlalchemy = super.sqlalchemy_1_4; };
   };
-in python.pkgs.buildPythonApplication rec {
+in
+python.pkgs.buildPythonApplication rec {
   pname = "pacu";
   version = "1.5.2";
   pyproject = true;
@@ -27,34 +26,34 @@ in python.pkgs.buildPythonApplication rec {
     "dsnap"
     "sqlalchemy-utils"
     "sqlalchemy"
+    "pycognito"
     "urllib3"
   ];
 
-  nativeBuildInputs = with python.pkgs; [
-    poetry-core
-    pythonRelaxDepsHook
-  ];
+  build-system = with python.pkgs; [ poetry-core ];
 
-  propagatedBuildInputs = [
-    awscli
-  ] ++ (with python.pkgs; [
-    awscli
-    boto3
-    botocore
-    chalice
-    dsnap
-    jq
-    policyuniverse
-    pycognito
-    pyyaml
-    qrcode
-    requests
-    sqlalchemy
-    sqlalchemy-utils
-    toml
-    typing-extensions
-    urllib3
-  ]);
+  nativeBuildInputs = with python.pkgs; [ pythonRelaxDepsHook ];
+
+  dependencies =
+    [ awscli ]
+    ++ (with python.pkgs; [
+      awscli
+      boto3
+      botocore
+      chalice
+      dsnap
+      jq
+      policyuniverse
+      pycognito
+      pyyaml
+      qrcode
+      requests
+      sqlalchemy
+      sqlalchemy-utils
+      toml
+      typing-extensions
+      urllib3
+    ]);
 
   nativeCheckInputs = with python.pkgs; [
     moto
@@ -65,13 +64,12 @@ in python.pkgs.buildPythonApplication rec {
     export HOME=$(mktemp -d)
   '';
 
-  pythonImportsCheck = [
-    "pacu"
-  ];
+  pythonImportsCheck = [ "pacu" ];
 
   disabledTests = [
-    # sqlalchemy.exc.ArgumentError: Textual SQL expression
-    #"test_migrations"
+    # sAttributeError: module 'moto' has no attribute 'mock_s3'
+    "test_update"
+    "test_update_second_time"
   ];
 
   meta = with lib; {
diff --git a/pkgs/development/python-modules/dsnap/default.nix b/pkgs/development/python-modules/dsnap/default.nix
index d67cb02aa112..f14636df0654 100644
--- a/pkgs/development/python-modules/dsnap/default.nix
+++ b/pkgs/development/python-modules/dsnap/default.nix
@@ -1,17 +1,18 @@
-{ lib
-, aws-sam-cli
-, boto3
-, buildPythonPackage
-, cfn-lint
-, fetchFromGitHub
-, mock
-, moto
-, mypy-boto3-ebs
-, poetry-core
-, pytestCheckHook
-, pythonOlder
-, typer
-, urllib3
+{
+  lib,
+  aws-sam-cli,
+  boto3,
+  buildPythonPackage,
+  cfn-lint,
+  fetchFromGitHub,
+  mock,
+  moto,
+  mypy-boto3-ebs,
+  poetry-core,
+  pytestCheckHook,
+  pythonOlder,
+  typer,
+  urllib3,
 }:
 
 buildPythonPackage rec {
@@ -31,22 +32,18 @@ buildPythonPackage rec {
   postPatch = ''
     # Is no direct dependency
     substituteInPlace pyproject.toml \
-      --replace 'urllib3 = "^1.26.4"' 'urllib3 = "*"'
+      --replace-fail 'urllib3 = "^1.26.4"' 'urllib3 = "*"'
   '';
 
-  nativeBuildInputs = [
-    poetry-core
-  ];
+  build-system = [ poetry-core ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     boto3
     urllib3
   ];
 
   passthru.optional-dependencies = {
-    cli = [
-      typer
-    ];
+    cli = [ typer ];
     scannerd = [
       aws-sam-cli
       cfn-lint
@@ -60,17 +57,18 @@ buildPythonPackage rec {
     pytestCheckHook
   ] ++ lib.flatten (builtins.attrValues passthru.optional-dependencies);
 
-  pythonImportsCheck = [
-    "dsnap"
-  ];
+  # https://github.com/RhinoSecurityLabs/dsnap/issues/26
+  # ImportError: cannot import name 'mock_iam' from 'moto'
+  doCheck = false;
+
+  pythonImportsCheck = [ "dsnap" ];
 
   meta = with lib; {
     description = "Utility for downloading and mounting EBS snapshots using the EBS Direct API's";
-    mainProgram = "dsnap";
     homepage = "https://github.com/RhinoSecurityLabs/dsnap";
     changelog = "https://github.com/RhinoSecurityLabs/dsnap/releases/tag/v${version}";
     license = licenses.bsd3;
     maintainers = with maintainers; [ fab ];
+    mainProgram = "dsnap";
   };
 }
-