Build error

[patrickmay]

scsh> make
./build/build-image.sh .
"pwd/c/" 'scsh.image' '/usr/local/bin/scheme48 -h 0' './rx/interfaces.scm ./rx/packages.scm ./scheme/scsh-interfaces.scm ./scheme/scsh-package.scm ./scheme/lib/ccp-pack.scm ./scheme/lib/char-package.scm'

error: too many command arguments
#{input-port #{input-channel "standard input" 0}}
#{&read-command-error}
#{&i/o-port-error #{input-port #{input-channel "standard input" 0}}}
make: *** [scsh.image] Error 1
scsh>

MacOS High Sierra. Latest Xcode tools installed. Any idea what's wrong?