bump for ihaskell version

I can not get this to build with text 2.1 and ihaskell 0.11
because of conflicts with other packages, so it is not clear
if this is a useful change at this time.

hvega/flake.nix

@@ -33,6 +33,10 @@
         # Change the prompt to show that you are in a devShell
         shellHook = ''
   echo -e "*** \e[1;32mWelcome to hvega\e[0m ***"
+  ghc --version
+  cabal --version
+  hlint --version
+  echo -e ""
   export PS1='hvega:\A \e[1;34m\w\e[0m '
 	'';
         });

ihaskell-hvega/CHANGELOG.md

@@ -3,7 +3,8 @@ For the latest version of this document, please see
 
 ## 0.5.0.5
 
-Support text 2.1 (still not using this, so does it even work?).
+Support text 2.1 and IHaskell 0.11 (I am still not using IHaskell
+so there's no guarantee this will work).
 
 ## 0.5.0.4
 

ihaskell-hvega/flake.nix

@@ -0,0 +1,47 @@
+{
+  # inspired by: https://serokell.io/blog/practical-nix-flakes#packaging-existing-applications
+  description = "Allow vega visualizations to auto-display in IHaskell";
+  inputs.nixpkgs.url = "nixpkgs";
+  outputs = { self, nixpkgs }:
+    let
+      supportedSystems = [ "x86_64-linux" "x86_64-darwin" ];
+      # supportedSystems = [ "x86_64-linux" ];
+      forAllSystems = f: nixpkgs.lib.genAttrs supportedSystems (system: f system);
+      nixpkgsFor = forAllSystems (system: import nixpkgs {
+        inherit system;
+        overlays = [ self.overlay ];
+      });
+    in
+    {
+      overlay = (final: prev: {
+        ihaskell-hvega = final.haskellPackages.callCabal2nix "ihaskell-hvega" ./. {};
+        hvega = final.haskellPackages.callCabal2nix "../hvega" ./. {};
+      });
+      packages = forAllSystems (system: {
+         # do we need to set/override both?
+         hvega = nixpkgsFor.${system}.hvega;
+         ihaskell-hvega = nixpkgsFor.${system}.ihaskell-hvega;
+      });
+      defaultPackage = forAllSystems (system: self.packages.${system}.ihaskell-hvega);
+      checks = self.packages;
+      devShell = forAllSystems (system: let haskellPackages = nixpkgsFor.${system}.haskellPackages;
+        in haskellPackages.shellFor {
+          packages = p: [self.packages.${system}.ihaskell-hvega];
+          withHoogle = true;
+          buildInputs = with haskellPackages; [
+            haskell-language-server
+            hlint
+            cabal-install
+          ];
+        # Change the prompt to show that you are in a devShell
+        shellHook = ''
+  echo -e "*** \e[1;32mWelcome to ihaskell-hvega\e[0m ***"
+  ghc --version
+  cabal --version
+  hlint --version
+  echo -e ""
+  export PS1='ihaskell-hvega:\A \e[1;34m\w\e[0m '
+	'';
+        });
+  };
+}

ihaskell-hvega/ihaskell-hvega.cabal

@@ -24,7 +24,7 @@ library
   build-depends:       base >= 4.7 && < 5
                      , aeson >= 0.11 && < 2.3
                      , hvega < 0.13
-                     , ihaskell >= 0.10 && < 0.11
+                     , ihaskell >= 0.10 && < 0.12
                      , text >= 1.2 && < 2.2
 
   default-language:    Haskell2010