cabal2nix: fix build
Without this change, the build fails with: ``` Warning: This package indirectly depends on multiple versions of the same package. This is very likely to cause a compile failure. package hackage-db (hackage-db-2.0.1-AliTRXEJBGFAEMpONOEnbV) requires Cabal-2.4.0.1 package hpack (hpack-0.32.0-1iJuukTWmC4EGkYhAiFeII) requires Cabal-3.0.0.0-CD1INMNwoxXIKVgcu1nec5 package distribution-nixpkgs (distribution-nixpkgs-1.3.1-82Z2DCdLAUs8Q2gjtlPLz5) requires Cabal-3.0.0.0-CD1INMNwoxXIKVgcu1nec5 package cabal2nix (cabal2nix-2.15.0) requires Cabal-3.0.0.0-CD1INMNwoxXIKVgcu1nec5 package cabal2nix (cabal2nix-2.15.0) requires Cabal-3.0.0.0-CD1INMNwoxXIKVgcu1nec5 package cabal2nix (cabal2nix-2.15.0) requires Cabal-3.0.0.0-CD1INMNwoxXIKVgcu1nec5 ```
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@ -95,7 +95,11 @@ self: super: {
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# Newer versions don't compile.
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resolv = self.resolv_0_1_1_2;
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# cabal2nix needs the latest version of Cabal.
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cabal2nix = super.cabal2nix.overrideScope (self: super: { Cabal = self.Cabal_3_0_0_0; });
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# cabal2nix needs the latest version of Cabal, and the one
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# hackage-db uses must match, so take the latest
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cabal2nix = super.cabal2nix.overrideScope (self: super: {
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Cabal = self.Cabal_3_0_0_0;
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hackage-db = self.hackage-db_2_1_0;
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});
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}
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