2 files changed, 13 insertions, 4 deletions
diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 50901b7d1dac..0c6621c9659b 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -951,6 +951,13 @@ self: super: {
   # https://github.com/yesodweb/Shelly.hs/issues/162
   shelly = dontCheck super.shelly;
 
+  # hledger needs a newer megaparsec version than we have in LTS 12.x.
+  hledger-lib = super.hledger-lib.overrideScope (self: super: {
+    cassava-megaparsec = self.cassava-megaparsec_2_0_0;
+    hspec-megaparsec = self.hspec-megaparsec_2_0_0;
+    megaparsec = self.megaparsec_7_0_4;
+  });
+
   # Copy hledger man pages from data directory into the proper place. This code
   # should be moved into the cabal2nix generator.
   hledger = overrideCabal super.hledger (drv: {
@@ -976,7 +983,12 @@ self: super: {
       mkdir -p $out/share/info
       cp -v *.info* $out/share/info/
     '';
-  }));
+  })).overrideScope (self: super: {
+    cassava-megaparsec = self.cassava-megaparsec_2_0_0;
+    config-ini = self.config-ini_0_2_4_0;
+    hspec-megaparsec = self.hspec-megaparsec_2_0_0;
+    megaparsec = self.megaparsec_7_0_4;
+  });
   hledger-web = overrideCabal super.hledger-web (drv: {
     postInstall = ''
       for i in $(seq 1 9); do
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 d61915c5abde..4d91daa89a13 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
@@ -54,9 +54,6 @@ self: super: {
   free = self.free_5_1;
   haddock-library = dontCheck super.haddock-library_1_7_0;
   HaTeX = doJailbreak super.HaTeX;
-  hledger = doJailbreak super.hledger;
-  hledger-lib = doJailbreak super.hledger-lib;
-  hledger-ui = doJailbreak super.hledger-ui;
   hpack = self.hpack_0_31_1;
   hslua = self.hslua_1_0_1;
   hslua-module-text = self.hslua-module-text_0_2_0;