Install Homebrew packages on macOS Mojave Beta

I am trying to install some dependencies for flutter, which requires homebrew. The only problem is that homebrew does not install any tools.

For example, if I try both brew install --HEAD libimobiledevice, brew install ideviceinstaller and brew install ios-deploy, it gives me the following error (sometimes it is slightly different) and the tools do not install.

Last 15 lines from /Users/davidkeen/Library/Logs/Homebrew/makedepend/05.configure:
checking for rename... yes
checking for fchmod... yes
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking for X... configure: error: in `/private/tmp/makedepend-20180609-57475-hh24w0/makedepend-1.0.5':
configure: error: The pkg-config script could not be found or is too old.  Make sure it
is in your PATH or set the PKG_CONFIG environment variable to the full
path to pkg-config.

Alternatively, you may set the environment variables X_CFLAGS
and X_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

To get pkg-config, see <http://pkg-config.freedesktop.org/>.
See `config.log' for more details

Do not report this issue to Homebrew/brew or Homebrew/core!


Error: You are using macOS 10.14.
We do not provide support for this pre-release version.
You may encounter build failures or other breakages.
Please create pull-requests instead of filing issues.

Error: A newer Command Line Tools release is available.
Update them from Software Update in the App Store.


Error: You are using macOS 10.14.
We do not provide support for this pre-release version.
You may encounter build failures or other breakages.
Please create pull-requests instead of filing issues.

How am I meant to install these dependencies on macOS Mojave beta 1?

Please note that brew install cocoapods works, so I'm not sure if this is an issue with homebrew or package?

Error: Your Xcode (9.4) is too outdated.
Please update to Xcode 10.0 (or delete it).
Xcode can be updated from
  https://developer.apple.com/download/more/

Error: Xcode alone is not sufficient on Mojave.
Install the Command Line Tools:
  xcode-select --install

This is a different error, however the solution is the same: install the Xcode 10 Beta and then run xcode-select --install.

The Command Line Developer Tools are now available!

First, agree to the invisible license agreement.

Wait for it to install...

Now, Brew works happily.

I had this issue, there's an easy fix. Head over to https://developer.apple.com/downloads/more, sign in with your Apple ID and install Command Line Tools (macOS 10.14) for Xcode 10 Beta.

Check brew doctor:

$ sudo xcode-select --switch /Applications/Xcode-beta.app
$ brew install ideviceinstaller