Building .deb package from sources fails

[Francesco <fdprnd@dave.eu>]

Hello everyone,
I'm trying to build the .deb package from the sources of this 
repository: https://github.com/codeauroraforum/imx-kobs
This is what I have done looking at your helloworld example:

recipe imx-kobs_5.5.bb:
#
# This software is a part of ISAR.
# Copyright (C) 2015-2018 ilbers GmbH

DESCRIPTION = "imx-kobs"

LICENSE = "gpl-2.0"
PN = "imx-kobs"
PV = "5.5"

SRC_URI = 
"git://github.com/codeauroraforum/imx-kobs.git;protocol=https;destsuffix=${P}"
SRC_URI[md5sum] = "07a9c2114bd73fe3b6491118cbb0eef3"
SRCREV = "c70685de47cfb67c5e16e1631b7033023ca3e97c"
inherit dpkg


When I compile the package using bitbake I'm getting this:

dave@beleriand /mnt/elbe/Isar/isar/build $ bitbake 
multiconfig:lynx-config:imx-kobs
Parsing recipes: 100% 
|##############################################################################################################################################| 
Time: 0:00:00Parsing of 9 .bb files complete (0 cached, 9 parsed). 99 
targets, 0 skipped, 0 masked, 0 errors.
NOTE: Resolving any missing task queue dependencies
NOTE: Resolving any missing task queue dependencies
NOTE: Resolving any missing task queue dependencies
NOTE: Resolving any missing task queue dependencies
NOTE: Resolving any missing task queue dependencies
NOTE: Resolving any missing task queue dependencies
NOTE: Resolving any missing task queue dependencies
NOTE: Resolving any missing task queue dependencies
NOTE: Resolving any missing task queue dependencies
NOTE: Resolving any missing task queue dependencies
NOTE: Resolving any missing task queue dependencies
Initialising tasks: 100% 
|###########################################################################################################################################| 
Time: 0:00:00NOTE: Executing RunQueue Tasks
ERROR: mc:lynx-config:imx-kobs-5.5-r0 do_build: Function failed: 
do_build (log file is located at 
/mnt/elbe/Isar/isar/build/tmp/work/lynx-armhf/imx-kobs-5.5-r0/temp/log.do_build.17528)
ERROR: Logfile of failure stored in: 
/mnt/elbe/Isar/isar/build/tmp/work/lynx-armhf/imx-kobs-5.5-r0/temp/log.do_build.17528
Log data follows:
| DEBUG: Executing shell function do_build
| /build.sh: line 10: cd: 
/home/builder/imx-kobs//mnt/elbe/Isar/isar/build/tmp/work/lynx-armhf/imx-kobs-5.5-r0/imx-kobs-5.5: 
No such file or directory
| WARNING: exit code 1 from a shell command.
| ERROR: Function failed: do_build (log file is located at 
/mnt/elbe/Isar/isar/build/tmp/work/lynx-armhf/imx-kobs-5.5-r0/temp/log.do_build.17528)
ERROR: Task 
(multiconfig:lynx-config:/mnt/elbe/Isar/isar/meta-dave/recipes-devtools/kobs-ng/kobs-imx-5.5.bb:do_build) 
failed with exit code '1'
NOTE: Tasks Summary: Attempted 11 tasks of which 0 didn't need to be 
rerun and 1 failed.

Summary: 1 task failed:
multiconfig:lynx-config:/mnt/elbe/Isar/isar/meta-dave/recipes-devtools/kobs-ng/kobs-imx-5.5.bb:do_build
Summary: There was 1 ERROR message shown, returning a non-zero exit code.

If I look inside the build.sh line 10 is :

   9 # Go to build directory
  10 cd $1

How is $1 passed to the build.sh script from the recipe?
Why the path is messed up with this prefix : /home/builder/imx-kobs/, 
when the correct destination is : 
/mnt/elbe/Isar/isar/build/tmp/work/lynx-armhf/imx-kobs-5.5-r0/imx-kobs-5.5?
Am I misunderstanding something here?

Thanks for your help

Frank