Hi. I have icedtead both in my /etc/config.scm and in my user profile:
$ guix package --list-installed | grep icedtea
icedtea 3.0.1 out /gnu/store/krksxq6wzxi4bj9vc7g02axgjb7nrmgi-icedtea-3.0.1
$ ls /gnu/store/ | grep -e '.*icedtea.*-jdk'
1rxafkp02y1775viisji16nfam7syqq3-icedtea-2.6.6-jdk/
90aj0p2yfpcizf3dl0bds89i9ggx9pbq-icedtea-3.0.1-jdk/
9ls43rishmxbc9bwyl6v55a3rpsjdrqz-icedtea-3.0.1-jdk/
ivlpx5z72r2b2gzbx2fzvk43f3q1hq70-icedtea-2.6.5-jdk/
k9b628hrxrxyyn4mn6wsvpy530w9mrv2-icedtea-2.6.6-jdk/
qcgmxr29w967y8xzavls6zs1bcw6d8md-icedtea-2.6.5-jdk/
$ ls -l /gnu/store/ivlpx5z72r2b2gzbx2fzvk43f3q1hq70-icedtea-2.6.5-jdk/bin/javac
-r-xr-xr-x 2 root guixbuild 7816 Jan 1 1970 /gnu/store/ivlpx5z72r2b2gzbx2fzvk43f3q1hq70-icedtea-2.6.5-jdk/bin/javac
$ /gnu/store/ivlpx5z72r2b2gzbx2fzvk43f3q1hq70-icedtea-2.6.5-jdk/bin/javac -version
javac 1.7.0_99
But javac is not in my $PATH, neither in root's $PATH:
$ which javac
which: no javac in (/home/camel/.guix-profile/bin:/run/setuid-programs:/run/current-system/profile/bin:/run/current-system/profile/sbin)
# which javac
which: no javac in (/root/.guix-profile/bin:/run/setuid-programs:/run/current-system/profile/bin:/run/current-system/profile/sbin)