diff --git a/custom/pyproject.toml b/custom/pyproject.toml
index a99c73517..4e6ae167f 100644
--- a/custom/pyproject.toml
+++ b/custom/pyproject.toml
@@ -1,8 +1,7 @@
 [tool.poetry]
-package-mode = false
-name = 'demo-geomapfish-custom'
+name = 'custom'
 version = '0.0.0'
-description = 'Not used'
+description = 'Custom package for GeoMapFish demo'
 authors = []
 
 [tool.poetry.scripts]
@@ -52,3 +51,7 @@ prospector-profile-utils = "1.9.1"
 prospector-profile-duplicated = "1.6.0"
 types-requests = "2.32.0.20240914"
 types-oauthlib = "3.2.0.20240806"
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"