diff --git a/TODO.org b/TODO.org
index 9c5c68d..e080d1f 100644
--- a/TODO.org
+++ b/TODO.org
@@ -1,3 +1,4 @@
 #+TITLE: Project TODO
 
-* TODO Display size of current page (text + images)
+* DONE Display size of current page (text + images)
+CLOSED: [2020-02-23 Sun 00:18]
diff --git a/src/posts/0010-Haskell-Now/.envrc b/src/posts/0010-Haskell-Now/.envrc
new file mode 100644
index 0000000..1d953f4
--- /dev/null
+++ b/src/posts/0010-Haskell-Now/.envrc
@@ -0,0 +1 @@
+use nix
diff --git a/src/posts/0010-Haskell-Now/shell.nix b/src/posts/0010-Haskell-Now/shell.nix
index 817009b..594fbc1 100644
--- a/src/posts/0010-Haskell-Now/shell.nix
+++ b/src/posts/0010-Haskell-Now/shell.nix
@@ -1,26 +1,26 @@
-   { nixpkgs ? import (fetchTarball https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz) {} }:
-   let
-     inherit (nixpkgs) pkgs;
-     inherit (pkgs) haskellPackages;
+{ nixpkgs ? import (fetchTarball https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz) {} }:
+let
+  inherit (nixpkgs) pkgs;
+  inherit (pkgs) haskellPackages;
 
-     haskellDeps = ps: with ps; [
-       base
-       protolude
-       containers
-     ];
+  haskellDeps = ps: with ps; [
+    base
+    protolude
+    containers
+  ];
 
-     ghc = haskellPackages.ghcWithPackages haskellDeps;
+  ghc = haskellPackages.ghcWithPackages haskellDeps;
 
-     nixPackages = [
-       ghc
-       pkgs.gdb
-       haskellPackages.cabal-install
-     ];
-   in
-   pkgs.stdenv.mkDerivation {
-     name = "env";
-     buildInputs = nixPackages;
-     shellHook = ''
-        export PS1="\n\[[hs:\033[1;32m\]\W\[\033[0m\]]> "
-     '';
-   }
+  nixPackages = [
+    ghc
+    pkgs.gdb
+    haskellPackages.cabal-install
+  ];
+in
+pkgs.stdenv.mkDerivation {
+  name = "env";
+  buildInputs = nixPackages;
+  shellHook = ''
+     export PS1="\n\[[hs:\033[1;32m\]\W\[\033[0m\]]> "
+  '';
+}