Error installing purescript-list
<p>I'm new to Purescript and am following the tutorial for installation.  Purescript itself is working and I can start the CLI using <code>pulp psci</code>, but installing <code>purescript-list</code> runs into trouble.</p>

<p>Having entered the command <code>bower install purescript-lists --save</code>, I get a long list of package names, but when it gets to <code>purescript-eff</code> and <code>purescript-prelude</code> I run into some version conflicts:</p>

<pre><code>bower purescript-eff#^2.0.0                            cached https://github.com/purescript/purescript-eff.git#2.0.0
bower purescript-eff#^2.0.0                          validate 2.0.0 against https://github.com/purescript/purescript-eff.git#^2.0.0

Unable to find a suitable version for purescript-eff, please choose one by typing one of the numbers below:
    1) purescript-eff#^1.0.0 which resolved to 1.0.0 and is required by purescript-console#1.0.0
    2) purescript-eff#^2.0.0 which resolved to 2.0.0 and is required by purescript-st#2.0.0

Prefix the choice with ! to persist it to bower.json

? Answer
</code></pre>

<p>A similar message is shown for <code>purescript-prelude</code>.  No matter which options I choose, both <code>pulp build</code> and <code>pulp run</code> fail with:</p>

<pre><code>$ pulp build
* Building project in /Developer/purescript/training1
Error found:
in module PSCI.Support
at /Developer/purescript/training1/bower_components/purescript-psci-support/src/PSCI/Support.purs line 10, column 34 - line 10, column 53

  Cannot import value unsafeInterleaveEff from module Control.Monad.Eff.Unsafe
  It either does not exist or the module does not export it.


See https://github.com/purescript/purescript/wiki/Error-Code-UnknownImport for more information,
or to contribute content related to this error.


Compiling PSCI.Support
* ERROR: Subcommand terminated with exit code 1
</code></pre>

<p>What have I missed here?</p>

<p>Thanks</p>

<p>Chris W</p>