[R-sig-Debian] Problem when installing lme4 under Debian stretch

[John Woodard]

I am a new user in the Linux environment and recently encountered an error
when trying to install the car package. The error was related to
installation of a dependency (lme4). Here is the output from the
installation:

* installing *source* package ‘lme4’ ...
** package ‘lme4’ successfully unpacked and MD5 sums checked
** libs
g++  -I/usr/share/R/include -DNDEBUG
 -I"/usr/local/lib/R/site-library/Rcpp/include"
-I"/usr/local/lib/R/site-library/RcppEigen/include"   -DNDEBUG
-DEIGEN_DONT_VECTORIZE -fpic  -g -O2
-fdebug-prefix-map=/root/git/r-backports/stretch/r-base-3.4.2=.
-fstack-protector-strong -Wformat -Werror=format-security -Wdate-time
-D_FORTIFY_SOURCE=2 -g  -c external.cpp -o external.o
In file included from external.cpp:8:0:
predModule.h:12:23: fatal error: RcppEigen.h: No such file or directory
 #include <RcppEigen.h>
                       ^
compilation terminated.
/usr/lib/R/etc/Makeconf:168: recipe for target 'external.o' failed
make: *** [external.o] Error 1
ERROR: compilation failed for package ‘lme4’
* removing ‘/usr/local/lib/R/site-library/lme4’

I am using Raspbian Stretch with a Raspberry Pi. Might someone have a
suggestion about how to proceed?  Many thanks in advance!

John

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