conf-llvm 3.9

Error log

The package failed to build. The error log from opam follows.

You are using opam 2.1+, where external dependency handling has been integrated: consider calling opam directly, the 'depext' plugin interface is provided for backwards compatibility only
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
[ERROR] No solution for llvm.3.9 & stdlib-shims.0.3.0 & ocamlfind.1.9.6 & integers.0.7.0 & dune-configurator.3.15.3 & dune.3.15.3 & ctypes.0.22.0 & csexp.1.5.2 & conf-python-2-7.1.2 & conf-llvm.3.9 & conf-cmake.1 & conf-bash.1 & bigarray-compat.1.1.0:   * Missing dependency:
            - conf-llvm = 3.9
            depends on the unavailable system package 'llvm-3.9-dev'. Use `--no-depexts' to attempt installation anyway, or it is possible that a depext package name in the opam file is incorrect.


Command failed: opam --cli=2.1 list --readonly --external '--resolve=llvm.3.9,stdlib-shims.0.3.0,ocamlfind.1.9.6,integers.0.7.0,dune-configurator.3.15.3,dune.3.15.3,ctypes.0.22.0,csexp.1.5.2,conf-python-2-7.1.2,conf-llvm.3.9,conf-cmake.1,conf-bash.1,bigarray-compat.1.1.0' returned 20