update README

README.md

@@ -93,11 +93,11 @@ for example
 $ docker run -it -v `pwd`:/src echidna echidna-test /src/examples/solidity/basic/flags.sol
 ```
 
-
 If you'd prefer to build from source, use [Stack](https://docs.haskellstack.org/en/stable/README/).
 `stack install` should build and compile `echidna-test` in `~/.local/bin`.
 You will need to link against libreadline and libsecp256k1 (built with recovery enabled), which should be installed with the package manager of your choosing.
-Additionally, you need to install the latest release of [libff](https://github.com/scipr-lab/libff) (you can take a look to [this script](.travis/install-libff.sh) used in our CI tests)
+Additionally, you need to install the latest release of [libff](https://github.com/scipr-lab/libff) (you can take a look to [this script](.travis/install-libff.sh) used in our CI tests).
+Some linux distributions do not ship static libraries for certain things that Haskell needs, e.g. archlinux, which will cause `stack build` to fail with linking errors because we use the `-static` flag. Removing these from `package.yaml` should get everything to build if you are not looking for a static build.
 
 If you're getting errors building related to linking, try tinkering with `--extra-include-dirs` and `--extra-lib-dirs`.