haskellPackages: preserve ghc-exactprint 1.4.1

We'll continue using this version for GHC 9.2.1. 1.5.0 changes behavior
in a breaking way, but the API stays the same, making it a risky
upgrade. Hopefully dependents will tell us via version constraints what
to use in the future.

pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml

@@ -168,6 +168,7 @@ extra-packages:
   - path == 0.9.0                       # 2021-12-03: path version building with stackage genvalidity and GHC 9.0.2
   - ormolu == 0.3.*                     # 2021-12-03: for HLS with GHC 9.0.2
   - fourmolu == 0.4.*                   # 2022-02-05: for HLS with GHC 9.0.2
+  - ghc-exactprint == 1.4.*             # 2022-02-07: preserve for now, 1.5.0 has a breaking change without type changes
 
 package-maintainers:
   abbradar:

pkgs/development/haskell-modules/hackage-packages.nix

@@ -106181,6 +106181,19 @@ self: {
        license = lib.licenses.bsd3;
      }) {};
 
+  "ghc-exactprint_1_4_1" = callPackage
+    ({ mkDerivation }:
+     mkDerivation {
+       pname = "ghc-exactprint";
+       version = "1.4.1";
+       sha256 = "0q9z43753arxbcs6mz26kz4dsz0c2i5hkxa125gl36vsipxfrq92";
+       isLibrary = true;
+       isExecutable = true;
+       description = "ExactPrint for GHC";
+       license = lib.licenses.bsd3;
+       hydraPlatforms = lib.platforms.none;
+     }) {};
+
   "ghc-exactprint_1_5_0" = callPackage
     ({ mkDerivation }:
      mkDerivation {