Be able to pass doOptimize/doProfiling flags to nix build

default.nix

@@ -2,6 +2,10 @@
 
 , doBenchmark ? false
 , doTracing   ? false
+# enables GHC optimizations for production use
+, doOptimize ? false 
+# enables profiling support in GHC
+, doProfiling  ? false
 , doStrict    ? false
 
 , rev     ? "b37872d4268164614e3ecef6e1f730d48cf5a90f"
@@ -70,7 +74,8 @@ drv = haskellPackages.developPackage {
       pkgs.haskell.packages.${compiler}.cabal-install
     ];
 
-    enableLibraryProfiling = false;
+    enableLibraryProfiling = doProfiling;
+    enableExecutableProfiling = doProfiling;
 
     testHaskellDepends = attrs.testHaskellDepends ++
       [ pkgs.nix
@@ -88,6 +93,7 @@ drv = haskellPackages.developPackage {
 
     configureFlags =
          pkgs.stdenv.lib.optional  doTracing   "--flags=tracing"
+      ++ pkgs.stdenv.lib.optional  doOptimize  "--flags=optimize"
       ++ pkgs.stdenv.lib.optional  doStrict    "--ghc-options=-Werror";
 
     passthru = {

hnix.cabal

@@ -2,7 +2,7 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 07b6631da5bfe4929607211146ef8fdde38ea28d4aece34188af8e33d0287e5e
+-- hash: bd9c8bad70af6e6bdc23b53988448061d7ab6aaee6054beb9d0f696e717f8a3c
 
 name:           hnix
 version:        0.5.2
@@ -573,7 +573,7 @@ executable hnix
       Paths_hnix
   hs-source-dirs:
       main
-  ghc-options: -Wall
+  ghc-options: -Wall -rtsopts
   build-depends:
       aeson
     , base >=4.9 && <5

package.yaml

@@ -155,6 +155,7 @@ executables:
   hnix:
     source-dirs: main
     main: Main.hs
+    ghc-options: -rtsopts
     dependencies:
       - hnix
       - aeson