diff --git a/pkgs/development/python-modules/cert-chain-resolver/default.nix b/pkgs/development/python-modules/cert-chain-resolver/default.nix
index 91da4c22f15d..a5aa6edc6f0e 100644
--- a/pkgs/development/python-modules/cert-chain-resolver/default.nix
+++ b/pkgs/development/python-modules/cert-chain-resolver/default.nix
@@ -1,26 +1,30 @@
 {
   lib,
   buildPythonPackage,
+  cacert,
   cryptography,
   fetchFromGitHub,
+  setuptools,
   pytestCheckHook,
   pytest-mock,
   six,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "cert-chain-resolver";
   version = "1.4.1";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "rkoopmans";
     repo = "python-certificate-chain-resolver";
-    tag = version;
+    tag = finalAttrs.version;
     hash = "sha256-DWE+mR7EO5ohuRAR0WC40GBY7HpwXIpU0hhVUnWNRno=";
   };
 
-  propagatedBuildInputs = [ cryptography ];
+  build-system = [ setuptools ];
+
+  dependencies = [ cryptography ];
 
   nativeCheckInputs = [
     pytestCheckHook
@@ -28,10 +32,13 @@ buildPythonPackage rec {
     six
   ];
 
+  env.SSL_CERT_FILE = "${cacert}/etc/ssl/certs/ca-bundle.crt";
+
   disabledTests = [
     # Tests require network access
     "test_cert_returns_completed_chain"
     "test_display_flag_is_properly_formatted"
+    "test_display_flag_includes_warning_when_root_was_requested_but_not_found"
   ];
 
   pythonImportsCheck = [ "cert_chain_resolver" ];
@@ -40,8 +47,8 @@ buildPythonPackage rec {
     description = "Resolve / obtain the certificate intermediates of a x509 certificate";
     mainProgram = "cert-chain-resolver";
     homepage = "https://github.com/rkoopmans/python-certificate-chain-resolver";
-    changelog = "https://github.com/rkoopmans/python-certificate-chain-resolver/blob/${src.tag}/CHANGELOG.md";
+    changelog = "https://github.com/rkoopmans/python-certificate-chain-resolver/blob/${finalAttrs.src.tag}/CHANGELOG.md";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ veehaitch ];
   };
-}
+})