Get rid of this line, also empty toolchainopts seen below.
Format it like https://github.com/hpcugent/easybuild-easyconfigs/blob/master/easybuild/easyconfigs/b/bam2fastq/bam2fastq-1.1.0-goolf-1.4.10.eb
Finally, even you can provide an ictce/5.3.0 build we could cheer about it (don't feel obliged though)