$ ~/local/chicken-5.2.0/bin/chicken-install -verbose sendfile
sendfile not cached
resolving alias `call-cc' to: http://code.call-cc.org/cgi-bin/henrietta.cgi
trying server http://code.call-cc.org/cgi-bin/henrietta.cgi ...
downloading sendfile: http://code.call-cc.org/cgi-bin/henrietta.cgi
connecting to host "code.call-cc.org", port 80 ...
requesting "/cgi-bin/henrietta.cgi?name=sendfile&release=5&mode=default&tests=yes" ...
reading response ...
HTTP/1.1 200 OK
Date: Wed, 25 Mar 2020 19:11:25 GMT
Server: Apache/2.4.38 (Debian)
Connection: close
Vary: Accept-Encoding
Transfer-Encoding: chunked
Content-Type: text/plain
reading chunks ............
reading files ...
  ./feature-tests/
  ./feature-tests/sendfile-linux.c
  ./feature-tests/madvise.c
  ./feature-tests/sendfile-macos.c
  ./feature-tests/sendfile-bsd.c
  ./feature-tests/mmap.c
  ./feature-tests/sendfile-sun.c
  ./feature-tests/posix-fadvise.c
  ./sendfile.egg
  ./build-sendfile
  ./tests/
  ./tests/benchmark.scm
  ./tests/test-helper.scm
  ./tests/run.scm
  ./tests/benchmark.result
  ./backward-compatibility.scm
cp -r '/tmp/temp9c3b.19127'/* '/home/mario/.cache/chicken-install/sendfile'
sendfile located at /home/mario/.cache/chicken-install/sendfile
checking sendfile ...
checking platform for `sendfile'
checking dependencies for `sendfile'
install order:
("sendfile")
building sendfile
running script /home/mario/.cache/chicken-install/sendfile/sendfile.build.sh
executing: "sh /home/mario/.cache/chicken-install/sendfile/sendfile.build.sh"
   /home/mario/.cache/chicken-install/sendfile/build-sendfile -host -D compiling-extension -J -s -regenerate-import-libraries -setup-mode -I /home/mario/.cache/chicken-install/sendfile -C -I/home/mario/.cache/chicken-install/sendfile -O2 -d1 sendfile.scm -o /home/mario/.cache/chicken-install/sendfile/sendfile.so
csc: file `sendfile.scm' does not exist

Error: shell command terminated with nonzero exit code
16384
"sh /home/mario/.cache/chicken-install/sendfile/sendfile.build.sh"