starting phase `build'
==> elixir (compile)
Compiled src/elixir_parser.yrl
Compiled src/elixir_rewrite.erl
Compiled src/elixir_erl_var.erl
Compiled src/elixir_code_server.erl
Compiled src/elixir_erl_compiler.erl
Compiled src/elixir_compiler.erl
Compiled src/elixir_bitstring.erl
Compiled src/elixir_erl.erl
Compiled src/elixir_lexical.erl
Compiled src/elixir_fn.erl
Compiled src/elixir_overridable.erl
Compiled src/elixir_erl_for.erl
Compiled src/elixir_utils.erl
Compiled src/elixir_module.erl
Compiled src/elixir_dispatch.erl
Compiled src/elixir_erl_try.erl
Compiled src/elixir_erl_clauses.erl
Compiled src/elixir_import.erl
Compiled src/elixir_sup.erl
Compiled src/elixir_bootstrap.erl
Compiled src/elixir_tokenizer.erl
Compiled src/elixir_locals.erl
Compiled src/elixir.erl
Compiled src/elixir_def.erl
Compiled src/elixir_config.erl
Compiled src/elixir_env.erl
Compiled src/elixir_interpolation.erl
Compiled src/elixir_map.erl
Compiled src/elixir_quote.erl
Compiled src/elixir_expand.erl
Compiled src/elixir_aliases.erl
Compiled src/elixir_errors.erl
Compiled src/elixir_clauses.erl
Compiled src/elixir_erl_pass.erl
Compiled src/elixir_parser.erl
==> bootstrap (compile)
Compiled lib/elixir/lib/kernel.ex
Compiled lib/elixir/lib/macro/env.ex
Compiled lib/elixir/lib/keyword.ex
Compiled lib/elixir/lib/module.ex
Compiled lib/elixir/lib/list.ex
Compiled lib/elixir/lib/macro.ex
Compiled lib/elixir/lib/code.ex
Compiled lib/elixir/lib/module/locals_tracker.ex
Compiled lib/elixir/lib/kernel/typespec.ex
Compiled lib/elixir/lib/kernel/utils.ex
Compiled lib/elixir/lib/behaviour.ex
warning: erlang:get_stacktrace/0 used in the wrong part of 'try' expression. (Use it in the block between 'catch' and 'end'.)
  /tmp/guix-build-elixir-1.5.2.drv-0/elixir-1.5.2/lib/elixir/lib/exception.ex:1150

Compiled lib/elixir/lib/exception.ex
Compiled lib/elixir/lib/protocol.ex
Compiled lib/elixir/lib/stream/reducers.ex
Compiled lib/elixir/lib/enum.ex
Compiled lib/elixir/lib/inspect/algebra.ex
Compiled lib/elixir/lib/inspect.ex
Compiled lib/elixir/lib/range.ex
Compiled lib/elixir/lib/regex.ex
Compiled lib/elixir/lib/string.ex
Compiled lib/elixir/lib/string/chars.ex
Compiled lib/elixir/lib/io.ex
Compiled lib/elixir/lib/path.ex
Compiled lib/elixir/lib/file.ex
Compiled lib/elixir/lib/system.ex
Compiled lib/elixir/lib/kernel/cli.ex
Compiled lib/elixir/lib/kernel/error_handler.ex
Compiled lib/elixir/lib/kernel/parallel_compiler.ex
Compiled lib/elixir/lib/kernel/lexical_tracker.ex
==> elixir (compile)
warning: behaviour String.Chars is undefined
  lib/calendar/date.ex:582

warning: behaviour Inspect is undefined
  lib/calendar/date.ex:588

warning: behaviour Enumerable is undefined
  lib/calendar/date_range.ex:21

warning: behaviour Inspect is undefined
  lib/calendar/date_range.ex:81

warning: behaviour String.Chars is undefined
  lib/calendar/time.ex:476

warning: behaviour String.Chars is undefined
  lib/calendar/datetime.ex:473

warning: behaviour Inspect is undefined
  lib/calendar/time.ex:482

warning: behaviour Inspect is undefined
  lib/calendar/datetime.ex:482

warning: behaviour String.Chars is undefined
  lib/calendar/naive_datetime.ex:677

warning: behaviour Inspect is undefined
  lib/calendar/naive_datetime.ex:684

warning: use Dict is deprecated, use the Map module for working with maps or the Keyword module for working with keyword lists
  lib/hash_dict.ex:11

warning: erlang:get_stacktrace/0 used in the wrong part of 'try' expression. (Use it in the block between 'catch' and 'end'.)
  lib/exception.ex:1150


== Compilation error in file lib/system.ex ==
** (ArgumentError) argument error
    :erlang.port_command(#Port<0.4339>, ['(', "git rev-parse --short HEAD 2> /dev/null", [10, 41, 32, 60, 47, 100, 101, 118, 47, 110, 117, 108, 108, 59, 32, 101, 99, 104, 111, 32, 34, 4, 34, 10]])
    (kernel) os.erl:242: :os.cmd/1
    (stdlib) erl_eval.erl:670: :erl_eval.do_apply/6
    (stdlib) erl_eval.erl:878: :erl_eval.expr_list/6
    (stdlib) erl_eval.erl:552: :erl_eval.local_func/6
    expanding macro: System.get_revision/0
    lib/system.ex:132: System.revision/0
make: *** [Makefile:81: lib/elixir/ebin/Elixir.Kernel.beam] Error 1
phase `build' failed after 54.4 seconds
builder for `/gnu/store/iwiic5ma374k0l4409qdz5dfknfg7qh3-elixir-1.5.2.drv' failed with exit code 1
@ build-failed /gnu/store/iwiic5ma374k0l4409qdz5dfknfg7qh3-elixir-1.5.2.drv - 1 builder for `/gnu/store/iwiic5ma374k0l4409qdz5dfknfg7qh3-elixir-1.5.2.drv' failed with exit code 1
guix build: error: build failed: build of `/gnu/store/iwiic5ma374k0l4409qdz5dfknfg7qh3-elixir-1.5.2.drv' failed