Pass through inputMap

Author: michaelpj

flake.nix

@@ -39,6 +39,8 @@
       supportedSystems = import ./supported-systems.nix;
       defaultSystem = head supportedSystems;
 
+      inputMap = { "https://input-output-hk.github.io/cardano-haskell-packages" = CHaP; };
+
       overlays = [
         haskellNix.overlay
         iohkNix.overlays.haskell-nix-extra
@@ -57,7 +59,7 @@
               environments;
           };
         })
-        (import ./nix/pkgs.nix)
+        (import ./nix/pkgs.nix { inherit inputMap; })
       ];
 
     in eachSystem supportedSystems (system:

nix/haskell.nix

@@ -7,12 +7,14 @@
   # Enable profiling
 , profiling ? config.haskellNix.profiling or false
   # Version info, to be passed when not building from a git work tree
-, gitrev }:
+, gitrev 
+  # Map from URLs to input, for custom hackage sources
+, inputMap }:
 let
 
   projectPackages = lib.attrNames (haskell-nix.haskellLib.selectProjectPackages
     (haskell-nix.cabalProject' {
-      inherit src;
+      inherit src inputMap;
       compiler-nix-name = compiler;
     }).hsPkgs);
 
@@ -58,7 +60,7 @@ let
   # This creates the Haskell package set.
   # https://input-output-hk.github.io/haskell.nix/user-guide/projects/
   pkgSet = haskell-nix.cabalProject' {
-    inherit src;
+    inherit src inputMap;
     compiler-nix-name = compiler;
     modules = [
       {

nix/pkgs.nix

@@ -1,3 +1,4 @@
+{ inputMap }:
 # our packages overlay
 final: prev:
 with final;
@@ -14,7 +15,7 @@ in {
     name = "cardano-db-sync-schema";
   };
 
-  cardanoDbSyncProject = callPackage ./haskell.nix { inherit compiler; };
+  cardanoDbSyncProject = callPackage ./haskell.nix { inherit compiler inputMap; };
 
   cardanoDbSyncHaskellPackages = cardanoDbSyncProject.hsPkgs;