[fix] adds --pure argument to all build commands.

23 jobs for develop-fixbuild in 2 minutes and 35 seconds (queued for 1 second)
Name Stage Failure
dhrun/hello Test
check step: done
post-processing step:no post-processing commands to run.
Error log:
This process' execution ended with an exception: waitForProcess: does not exist (No child processes)
Cmd {name = CommandName "nrm", exitcode = Nothing, args = [Arg "run",Arg "-s",Arg "testContainer",Arg "--manifest=../hsnrm/resources/examples-manifests/libnrm.dhall",Arg "--",Arg "echo",Arg "HelloWorld"], vars = [], passvars = [VarName "PATH",VarName "PWD",VarName "PYTHONPATH",VarName "NRMSO"], out = FileCheck {filename = FileName "nrmrun.out", filecheck = ["Traceback"]}, err = FileCheck {filename = FileName "nrmrun.err", filecheck = ["Traceback"]}, postchecks = [FileCheck {filename = FileName "nrmrun.out", filecheck = Check {avoids = [Pattern "Traceback"], wants = [Pattern "HelloWorld"]}}], timeout = Just 600, otherwd = Nothing}
post-mortem check fail: HelloWorld not found in file nrmrun.out
Failure. exiting.
make: *** [Makefile:50: dhrun/hello] Error 1
ERROR: Job failed: exit status 1