diff --git a/pkgs/development/python-modules/serverlessrepo/default.nix b/pkgs/development/python-modules/serverlessrepo/default.nix
index 2a8267710a09..d3cc7e9c633b 100644
--- a/pkgs/development/python-modules/serverlessrepo/default.nix
+++ b/pkgs/development/python-modules/serverlessrepo/default.nix
@@ -1,16 +1,20 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, pytest
+, pytestCheckHook
 , boto3
 , six
 , pyyaml
 , mock
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "serverlessrepo";
   version = "0.1.10";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
@@ -23,12 +27,25 @@ buildPythonPackage rec {
     pyyaml
   ];
 
-  checkInputs = [ pytest mock ];
+  checkInputs = [
+    pytestCheckHook
+    mock
+  ];
 
-  checkPhase = ''
-    pytest tests/unit
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "pyyaml~=5.1" "pyyaml" \
+      --replace "boto3~=1.9, >=1.9.56" "boto3"
   '';
 
+  pytestFlagsArray = [
+    "tests/unit"
+  ];
+
+  pythonImportsCheck = [
+    "serverlessrepo"
+  ];
+
   meta = with lib; {
     homepage = "https://github.com/awslabs/aws-serverlessrepo-python";
     description = "Helpers for working with the AWS Serverless Application Repository";
@@ -36,7 +53,7 @@ buildPythonPackage rec {
       A Python library with convenience helpers for working with the
       AWS Serverless Application Repository.
     '';
-    license = lib.licenses.asl20;
+    license = licenses.asl20;
     maintainers = with maintainers; [ dhkl ];
   };
 }
diff --git a/pkgs/development/tools/aws-sam-cli/default.nix b/pkgs/development/tools/aws-sam-cli/default.nix
index d38ac9ba88c9..444bc39bddd0 100644
--- a/pkgs/development/tools/aws-sam-cli/default.nix
+++ b/pkgs/development/tools/aws-sam-cli/default.nix
@@ -5,16 +5,13 @@
 
 python3.pkgs.buildPythonApplication rec {
   pname = "aws-sam-cli";
-  version = "1.36.0";
+  version = "1.37.0";
 
   src = python3.pkgs.fetchPypi {
     inherit pname version;
-    sha256 = "sha256-GJbBhe1l25ZHGWVu1o2oJvd/BNv8dv7aIYor/ebFl9U=";
+    hash = "sha256-XE3g2mKwAiaJvi0ShVScnCKrmz7ujaQgOeFXuYwtP4g=";
   };
 
-  # Tests are not included in the PyPI package
-  doCheck = false;
-
   propagatedBuildInputs = with python3.pkgs; [
     aws-lambda-builders
     aws-sam-translator
@@ -42,18 +39,22 @@ python3.pkgs.buildPythonApplication rec {
   # fix over-restrictive version bounds
   postPatch = ''
     substituteInPlace requirements/base.txt \
+      --replace "aws_lambda_builders==" "aws-lambda-builders #" \
       --replace "click~=7.1" "click~=8.0" \
-      --replace "Flask~=1.1.2" "Flask~=2.0" \
       --replace "dateparser~=1.0" "dateparser>=0.7" \
       --replace "docker~=4.2.0" "docker>=4.2.0" \
-      --replace "requests==" "requests #" \
-      --replace "watchdog==" "watchdog #" \
-      --replace "aws_lambda_builders==" "aws-lambda-builders #" \
-      --replace "typing_extensions==" "typing-extensions #" \
+      --replace "Flask~=1.1.2" "Flask~=2.0" \
+      --replace "PyYAML~=5.3" "PyYAML" \
       --replace "regex==" "regex #" \
-      --replace "tzlocal==3.0" "tzlocal"
+      --replace "requests==" "requests #" \
+      --replace "typing_extensions==" "typing-extensions #" \
+      --replace "tzlocal==3.0" "tzlocal" \
+      --replace "watchdog==" "watchdog #"
   '';
 
+  # Tests are not included in the PyPI package
+  doCheck = false;
+
   meta = with lib; {
     homepage = "https://github.com/awslabs/aws-sam-cli";
     description = "CLI tool for local development and testing of Serverless applications";