Installer does not detect Java installation.

[tomaszguzialek]

I use R on Mac OS X and while trying to install Redshift for R I get:

> devtools::install_github("pingles/redshift-r")
Downloading GitHub repo pingles/redshift-r@master
Installing redshift
Installing 2 packages: RJDBC, rJava
tar: Failed to set default locale
tar: Failed to set default locale
'/Library/Frameworks/R.framework/Resources/bin/R' --no-site-file --no-environ --no-save --no-restore  \
  CMD INSTALL  \
  '/private/var/folders/f5/dc6td4xn0v9c3y_nl_4626cr0000gn/T/Rtmp60R573/devtools9e31f665157/pingles-redshift-r-104b74a'  \
  --library='/Library/Frameworks/R.framework/Versions/3.2/Resources/library' --install-tests 

During startup - Warning messages:
1: Setting LC_CTYPE failed, using "C" 
2: Setting LC_TIME failed, using "C" 
3: Setting LC_MESSAGES failed, using "C" 
4: Setting LC_MONETARY failed, using "C" 
* installing *source* package 'redshift' ...
** R
** inst
** preparing package for lazy loading
No Java runtime present, requesting install.
Error: Command failed (97)

The installer asks me to install legacy Java 6 while I have Oracle Java 8 installed. Running java -version in Terminal is successful.