cabal-install ignores the --offline flag for custom package repositories, which
makes the build fail under poudriere

--- cabal.project.orig	2024-02-14 15:49:35 UTC
+++ cabal.project
@@ -1,14 +1,3 @@
-repository cardano-haskell-packages
-  url: https://chap.intersectmbo.org/
-  secure: True
-  root-keys:
-    3e0cce471cf09815f930210f7827266fd09045445d65923e6d0238a6cd15126f
-    443abb7fb497a134c343faf52f0b659bd7999bc06b7f63fa76dc99d631f9bea1
-    a86a1f6ce86c449c46666bda44268677abf29b5b2d2eb5ec7af903ec2f117a82
-    bcec67e8e99cabfa7764d75ad9b158d72bfacf70ca1d0ec8bc6b4406d1bf8413
-    c00aae8461a256275598500ea0e187588c35a5d5d7454fb57eac18d9edb86a56
-    d4a35cd3121aa00d18544bb0ac01c3e1691d618f462c46129271bccf39f7e8ee
-
 index-state:
   , hackage.haskell.org 2023-11-20T23:52:53Z
   , cardano-haskell-packages 2023-12-06T19:40:56Z