From 8536d2cfdb2eba887f1cc1681b151c789781da08 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?F=C3=A9lix=20Baylac=20Jacqu=C3=A9?=
 <felix@alternativebit.fr>
Date: Wed, 18 Dec 2019 18:02:31 +0100
Subject: [PATCH] repro

---
 cabal.project              | 10 ++++++++++
 default.nix                | 24 ++++++++++++++++++++++++
 dummy-app/app/dummy-app.hs |  2 ++
 dummy-app/dummy-app.cabal  | 21 +++++++++++++++++++++
 4 files changed, 57 insertions(+)
 create mode 100644 cabal.project
 create mode 100644 default.nix
 create mode 100644 dummy-app/app/dummy-app.hs
 create mode 100644 dummy-app/dummy-app.cabal

diff --git a/cabal.project b/cabal.project
new file mode 100644
index 0000000..e5b4562
--- /dev/null
+++ b/cabal.project
@@ -0,0 +1,10 @@
+packages:
+    dummy-app
+
+package dummy-app
+  ghc-options: -Wall -Werror -fwarn-redundant-constraints
+
+source-repository-package
+  type: git
+  location: http://github.com/well-typed/canonical-json
+  tag: ddfe3593b80b5ceb88842bb7a6f2268df75d2c2f
\ No newline at end of file
diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..b6b7dc2
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,24 @@
+{
+  customConfig ? {},
+  target ? builtins.currentSystem,
+  haskellCompiler ? "ghc865"
+}:
+let
+  lib = import ./nix/lib.nix;
+  # Instantiate a package set using the generated file.
+in
+  lib.pkgs.haskell-nix.cabalProject {
+    src = lib.pkgs.haskell-nix.haskellLib.cleanGit { src = ./.; };
+    ghc = lib.pkgs.buildPackages.pkgs.haskell-nix.compiler.${haskellCompiler};
+    pkg-def-extras = [
+    #   # Additional packages ontop of all those listed in `cabal.project`
+    ];
+    modules = [
+    #   # Specific package overrides would go here for example:
+    #   packages.cbors.package.ghcOptions = "-Werror";
+    #   packages.cbors.patches = [ ./one.patch ];
+    #   packages.cbors.flags.optimize-gmp = false;
+    #   # It may be better to set flags in `cabal.project` instead
+    #   # (`plan-to-nix` will include them as defaults).
+    ];
+  }
diff --git a/dummy-app/app/dummy-app.hs b/dummy-app/app/dummy-app.hs
new file mode 100644
index 0000000..e9e1deb
--- /dev/null
+++ b/dummy-app/app/dummy-app.hs
@@ -0,0 +1,2 @@
+main :: IO ()
+main = undefined
diff --git a/dummy-app/dummy-app.cabal b/dummy-app/dummy-app.cabal
new file mode 100644
index 0000000..15930be
--- /dev/null
+++ b/dummy-app/dummy-app.cabal
@@ -0,0 +1,21 @@
+name:                  dummyapp
+version:               1.0.0
+description:           ...
+author:                ...
+maintainer:            ...@....io
+license:               Apache-2.0
+build-type:            Simple
+cabal-version:         >= 1.10
+extra-source-files:    README.md, ChangeLog.md
+
+executable dummy-app
+  hs-source-dirs:      app
+  main-is:             dummy-app.hs
+  default-language:    Haskell2010
+  ghc-options:         -threaded
+                       -Wall
+                       -O2
+                       "-with-rtsopts=-T"
+                       -fno-warn-unticked-promoted-constructors
+
+  build-depends:       base
\ No newline at end of file