diff --git a/Shakefile.hs b/Shakefile.hs
new file mode 100644
index 0000000..34d03af
--- /dev/null
+++ b/Shakefile.hs
@@ -0,0 +1,38 @@
+import Development.Shake
+import Development.Shake.Command
+import Development.Shake.FilePath
+import Development.Shake.Util
+
+main :: IO ()
+main = do
+  let shOpts = shakeOptions { shakeVerbosity = Chatty, shakeLintInside = ["\\"] }
+  shakeArgsForward shOpts buildRules
+
+buildRules :: Action ()
+buildRules = do
+  allPosts <- buildPosts
+  buildIndex allPosts
+  buildFeed allPosts
+  copyStaticFiles
+
+-- | Find and build all posts
+buildPosts :: Action [Post]
+buildPosts = do
+  pPaths <- getDirectoryFiles "." ["site/posts//*.md"]
+  forP pPaths buildPost
+
+-- | Load a post, process metadata, write it to output, then return the post object
+-- Detects changes to either post content or template
+buildPost :: FilePath -> Action Post
+buildPost srcPath = cacheAction ("build" :: T.Text, srcPath) $ do
+  liftIO . putStrLn $ "Rebuilding post: " <> srcPath
+  postContent <- readFile' srcPath
+  -- load post content and metadata as JSON blob
+  postData <- markdownToHTML . T.pack $ postContent
+  let postUrl = T.pack . dropDirectory1 $ srcPath -<.> "html"
+      withPostUrl = _Object . at "url" ?~ String postUrl
+  -- Add additional metadata we've been able to compute
+  let fullPostData = withSiteMeta . withPostUrl $ postData
+  template <- compileTemplate' "site/templates/post.html"
+  writeFile' (outputFolder </> T.unpack postUrl) . T.unpack $ substitute template fullPostData
+  convert fullPostData
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..71b68d1
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+mkdir -p _shake
+ghc --make Shakefile.hs -rtsopts -threaded -with-rtsopts=-I0 -outputdir=_shake -o _shake/build && _shake/build "$@"
diff --git a/engine/compresscss.sh b/engine/compresscss.sh
index 763a779..00094c1 100755
--- a/engine/compresscss.sh
+++ b/engine/compresscss.sh
@@ -1,8 +1,3 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i bash
-#!nix-shell -I nixpkgs="https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz"
-#!nix-shell -p minify
-
-# nix-shell -p nodePackages.clean-css
+#!/usr/bin/env bash
 
 minify "$1" > "$2"
diff --git a/engine/dup-for-themes.sh b/engine/dup-for-themes.sh
index ae10842..f9d8c65 100755
--- a/engine/dup-for-themes.sh
+++ b/engine/dup-for-themes.sh
@@ -1,6 +1,4 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i zsh
-#!nix-shell -I nixpkgs="https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz"
+#!/usr/bin/env zsh
 
 cd "$(git rev-parse --show-toplevel)" || exit 1
 
diff --git a/engine/mkrss.sh b/engine/mkrss.sh
index 77f804e..f964ee5 100755
--- a/engine/mkrss.sh
+++ b/engine/mkrss.sh
@@ -1,6 +1,4 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i zsh
-#!nix-shell -I nixpkgs="https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz"
+#!/usr/bin/env zsh
 
 cd "$(git rev-parse --show-toplevel)" || exit 1
 # Directory
diff --git a/engine/optim-classes.sh b/engine/optim-classes.sh
index 9f78d68..2b5d0e7 100755
--- a/engine/optim-classes.sh
+++ b/engine/optim-classes.sh
@@ -1,6 +1,4 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i zsh
-#!nix-shell -I nixpkgs="https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz"
+#!/usr/bin/env zsh
 
 cd "$(git rev-parse --show-toplevel)" || exit 1
 webdir="_optim"
diff --git a/engine/optim-html.sh b/engine/optim-html.sh
index baf1495..619f5f4 100755
--- a/engine/optim-html.sh
+++ b/engine/optim-html.sh
@@ -1,6 +1,4 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i zsh
-#!nix-shell -I nixpkgs="https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz"
+#!/usr/bin/env zsh
 
 cd "$(git rev-parse --show-toplevel)" || exit 1
 webdir="_optim"
diff --git a/engine/shell.nix b/engine/shell.nix
deleted file mode 100644
index 0eab84d..0000000
--- a/engine/shell.nix
+++ /dev/null
@@ -1,11 +0,0 @@
-# { pkgs ? import <nixpkgs> {} }:
-{ pkgs ? import (fetchTarball https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz) {} }:
-  pkgs.mkShell {
-    buildInputs = [ pkgs.coreutils
-                    pkgs.html-xml-utils
-                    pkgs.zsh
-                    pkgs.perl
-                    pkgs.perlPackages.URI
-                    pkgs.minify
-                  ];
-  }
diff --git a/engine/update-file-size.sh b/engine/update-file-size.sh
index 341ea88..9e70862 100755
--- a/engine/update-file-size.sh
+++ b/engine/update-file-size.sh
@@ -1,6 +1,4 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i zsh
-#!nix-shell -I nixpkgs="https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz"
+#!/usr/bin/env zsh
 
 cd "$(git rev-parse --show-toplevel)" || exit 1
 webdir="_optim"
diff --git a/project.el b/project.el
index 2db93e5..15ce804 100644
--- a/project.el
+++ b/project.el
@@ -284,7 +284,7 @@
      " %s" ;; source
      " -sampling-factor 4:2:0"
      " -strip"
-     " -resize 200x200\\>"
+     " -resize 300x300\\>"
      " -interlace Plane"
      " -quality 85"
      " -define filter:blur=0.75"
diff --git a/shell.nix b/shell.nix
index fad7781..59add58 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,15 +1,23 @@
-# { pkgs ? import <nixpkgs> {} }:
-{ pkgs ? import (fetchTarball https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz) {} }:
-  let my_aspell = pkgs.aspellWithDicts(p: with p; [en fr]);
-  in
-  pkgs.mkShell {
-    buildInputs = [ pkgs.coreutils
-                    pkgs.html-xml-utils
-                    pkgs.zsh
-                    pkgs.perl
-                    pkgs.perlPackages.URI
-                    pkgs.minify
-                    pkgs.haskellPackages.sws
-                    pkgs.cacert
-                  ];
+{ pkgs ? import (fetchTarball https://github.com/NixOS/nixpkgs/archive/20.03.tar.gz) {} }:
+let
+  haskellDeps = ps : with ps; [
+    shake
+  ];
+  pkgs1909 = import (fetchTarball https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz) {};
+  ghc = pkgs.haskellPackages.ghcWithPackages haskellDeps;
+in
+pkgs.mkShell {
+    buildInputs = with pkgs;
+      [cacert
+        coreutils
+        html-xml-utils
+        zsh
+        perl
+        perlPackages.URI
+        minify
+        niv
+        ghc
+        pkgs1909.haskellPackages.sws
+        haskellPackages.shake
+      ];
   }