2 files changed, 6 insertions, 0 deletions
diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
index eba62c95be92..0919292d44a5 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
@@ -40,6 +40,9 @@ self: super: {
   unix = null;
   xhtml = null;
 
+  # Needs Cabal 3.0.x.
+  cabal-install = super.cabal-install.overrideScope (self: super: { Cabal = self.Cabal_3_0_0_0; });
+
   # Restricts aeson to <1.4
   # https://github.com/purescript/purescript/pull/3537
   purescript = doJailbreak super.purescript;
diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
index 4e70648b71a0..4addc834040a 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
@@ -41,6 +41,9 @@ self: super: {
   unix = null;
   xhtml = null;
 
+  # Needs Cabal 3.0.x.
+  cabal-install = super.cabal-install.overrideScope (self: super: { Cabal = self.Cabal_3_0_0_0; });
+
   # https://github.com/tibbe/unordered-containers/issues/214
   unordered-containers = dontCheck super.unordered-containers;