https://github.com/bagel897/pytoolconfig/commit/7fbd830f1c302ed8151ecc2bd52c40cf70b1a580
https://bugs.gentoo.org/878189
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 name = "pytoolconfig"
 version = "1.2.2"
 description = "Python tool configuration"
-license-expression = "LGPL-3.0-or-later"
+license = "LGPL-3.0-or-later"
 dependencies = [
     "tomli>=2.0; python_version < \"3.11\"",
     "packaging>=21.3",
@@ -70,6 +70,6 @@ strict = true
 
 [build-system]
 requires = [
-    "pdm-pep517>=1.0.0",
+    "pdm-pep517>=1.0.5",
 ]
 build-backend = "pdm.pep517.api"