nix: add dhall to environment

2 files changed, 18 insertions, 1 deletions

diff --git a/nix/sources.json b/nix/sources.json
index 8e183ea..fbf61db 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -1,4 +1,11 @@
 {
+    "dhall": {
+        "sha256": "0jv2s3rjk4ha5vq0z4x5w9q3x01kxvwdadcj1a9x1qyx29xxi9qp",
+        "type": "tarball",
+        "url": "https://github.com/dhall-lang/dhall-haskell/releases/download/1.32.0/dhall-1.32.0-x86_64-linux.tar.bz2",
+        "url_template": "https://github.com/dhall-lang/dhall-haskell/releases/download/<version>/dhall-<version>-x86_64-linux.tar.bz2",
+        "version": "1.32.0"
+    },
     "nixpkgs": {
         "branch": "nixos-20.03",
         "description": "A read-only mirror of NixOS/nixpkgs tracking the released channels. Send issues and PRs to",
diff --git a/shell.nix b/shell.nix
index bcb9f47..fd71b9b 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,10 +1,20 @@
 let
   sources = import ./nix/sources.nix;
   pkgs = import sources.nixpkgs {};
+
+  dhall = pkgs.stdenv.mkDerivation rec {
+    name = "dhall-${version}";
+    version = sources.dhall.version;
+    src = sources.dhall;
+    installPhase = ''
+      mkdir -p $out/bin
+      cp $src/* $out/bin/
+    '';
+  };
 in
 pkgs.mkShell {
   buildInputs = with pkgs; [
     binutils cmake gcc gnumake openssl pkgconfig rustup
-    niv
+    niv dhall
   ];
 }