diff --git a/gnu/packages/python-crypto.scm b/gnu/packages/python-crypto.scm
index ffafee7dd6..86a826b7ed 100644
--- a/gnu/packages/python-crypto.scm
+++ b/gnu/packages/python-crypto.scm
@@ -29,6 +29,7 @@
 ;;; Copyright © 2022 Antero Mejr <antero@mailbox.org>
 ;;; Copyright © 2023 Juliana Sims <juli@incana.org>
 ;;; Copyright © 2023 Zheng Junjie <873216071@qq.com>
+;;; Copyright © 2024 jgart <jgart@dismail.de>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -90,12 +91,14 @@ (define-public python-base58
        (sha256
         (base32
          "1317ly0db7nnjg5k58f6nqa0svfcvn446xd5bpiyi0bfbczwpl65"))))
-    (build-system python-build-system)
+    (build-system pyproject-build-system)
     (arguments
-     '(#:phases (modify-phases %standard-phases
-                  (replace 'check
-                    (lambda* (#:key tests? #:allow-other-keys)
-                      (when tests? (invoke "pytest" "-vv")))))))
+     (list
+      #:phases
+      #~(modify-phases %standard-phases
+          (replace 'check
+            (lambda* (#:key tests? #:allow-other-keys)
+              (when tests? (invoke "pytest" "-vv")))))))
     (native-inputs
      (list python-pyhamcrest python-pytest python-pytest-benchmark))
     (home-page "https://github.com/keis/base58")