Add a nix shell for building

Author: googleson78

flake.lock

@@ -0,0 +1,45 @@
+# Note that this is probably an overestimation.
+{
+  description = "Build dependencies for clc-stackage";
+  inputs = {
+    flake-compat = {
+      url = "github:edolstra/flake-compat";
+      flake = false;
+    };
+  };
+
+  outputs = { self, nixpkgs, ... }:
+    with nixpkgs.legacyPackages.x86_64-linux;
+    {
+      devShell.x86_64-linux = mkShell {
+        buildInputs = [
+          cabal-install
+          libffi.dev
+          libGL
+          xorg.libX11
+          zlib
+          pkg-config
+          xorg.libXcursor
+          xorg.libXrandr
+          xorg.libXxf86vm
+          xorg.libXi
+          bzip2
+          curl
+          libGLU
+          xorg.libXau
+          xorg.libXinerama
+          blas
+          pcre
+          icu
+          lzlib
+          xz
+          lapack
+          expat
+          file
+          systemdMinimal
+          elfutils
+          xorg.libXext.dev
+        ];
+      };
+    };
+}

flake.nix

@@ -0,0 +1,10 @@
+(import
+  (
+    let lock = builtins.fromJSON (builtins.readFile ./flake.lock); in
+    fetchTarball {
+      url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+      sha256 = lock.nodes.flake-compat.locked.narHash;
+    }
+  )
+  { src = ./.; }
+).shellNix