[Learn you a Haskell](http://learnyouahaskell.com/chapters), [Introduction to Haskell 98](https://www.haskell.org/tutorial/index.html), and [Hackage](https://hackage.haskell.org/) are good resources.
-I'm using the basic Haskell Platform installation (install with
+# Toolchain
+
+I'm using the basic Haskell Platform installation, togeher with `Stack` to manage the packages and dependencies (install with
```
-$ sudo aptitude install haskell-platform
+$ sudo aptitude install haskell-platform haskell-stack
```
).
+I have one package for each day, to save time waiting for Stack to check every executable before compiling what's changed. Each package needs a separate directory tree and a separate `.cabal` file.
+
+Compile with
+```
+stack build
+```
+or
+```
+stack build adventofcode1601
+```
+
+Run with
+```
+stack exec advent01
+```
+
+Run interactively with
+```
+stack ghci adventofcode1601:exe:advent01
+```
+
+To profile, use
+```
+stack build --executable-profiling --library-profiling -ghc-options="-fprof-auto -rtsopts" adventofcode1601
+```
+then run with
+```
+stack exec -- advent01 +RTS -p -hy
+```
+
+# Readme
+
+Build this readme file wth
+```
+pandoc -s README.md > README.html
+```
+
+### Earlier instructions, for compiling before use of Stack
+
+I'm also using some extra libraries. Before installing, run `cabal update` then set `library-profiling: True` in `~/.cabal/config` . Then install the packages with
+```
+$ cabal install MissingH
+$ cabal install parsec-numbers
+$ cabal install cryptonite
+$ cabal install pqueue
+```
+
Compile the code with
```
ghc --make advent01.hs
advent01
```
-Build this readme file wth
+If you're profiling, compile and run with
```
-pandoc -s README.md > README.html
+ghc -O2 --make advent01.hs -prof -auto-all -caf-all -fforce-recomp -rstopts
+time ./advent01 +RTS -p -hy
```
-(Using the [Modest styles](https://github.com/markdowncss/modest).)
\ No newline at end of file
+and create the profile picture with `h2ps advent01.hp` .
+
+(Using the [Modest style](https://github.com/markdowncss/modest).)