cd js/src &&
> autoconf2.13 &&
> 
> ./configure --prefix=/usr       \
>             --with-intl-api     \
>             --with-system-zlib  \
>             --with-system-ffi   \
>             --with-system-nspr  \
>             --with-system-icu   \
>             --enable-threadsafe \
>             --enable-readline   &&
> make
creating cache ./config.cache
checking host system type... x86_64-unknown-linux-gnu
checking target system type... x86_64-unknown-linux-gnu
checking build system type... x86_64-unknown-linux-gnu
checking for mawk... no
checking for gawk... gawk
checking for perl5... no
checking for perl... /usr/bin/perl
checking for gcc... gcc
checking whether the C compiler (gcc  ) works... yes
checking whether the C compiler (gcc  ) is a cross-compiler... no
checking whether we are using GNU C... yes
checking whether gcc accepts -g... yes
checking for c++... c++
checking whether the C++ compiler (c++  ) works... yes
checking whether the C++ compiler (c++  ) is a cross-compiler... no
checking whether we are using GNU C++... yes
checking whether c++ accepts -g... yes
checking for ranlib... ranlib
checking for as... /usr/bin/as
checking for ar... ar
checking for ld... ld
checking for strip... strip
checking for windres... no
checking how to run the C preprocessor... gcc -E
checking how to run the C++ preprocessor... c++ -E
checking for sb-conf... no
checking for ve... no
checking for a BSD compatible install... /usr/bin/install -c
checking whether ln -s works... yes
checking for tar archiver... checking for gnutar... no
checking for gtar... no
checking for tar... tar
tar
checking for minimum required perl version >= 5.006... 5.026001
checking for full perl installation... yes
checking for python2.7... /usr/bin/python2.7
Creating Python environment
New python executable in /sources/mozjs-38.0.0/js/src/_virtualenv/bin/python2.7
Also creating executable in /sources/mozjs-38.0.0/js/src/_virtualenv/bin/python
Installing setuptools, pip...done.
running build_ext
building '_psutil_linux' extension
creating build
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/psutil
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c psutil/_psutil_linux.c -o build/temp.linux-x86_64-2.7/psutil/_psutil_linux.o
creating build/lib.linux-x86_64-2.7
gcc -pthread -shared build/temp.linux-x86_64-2.7/psutil/_psutil_linux.o -L/usr/lib -lpython2.7 -o build/lib.linux-x86_64-2.7/_psutil_linux.so
building '_psutil_posix' extension
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c psutil/_psutil_posix.c -o build/temp.linux-x86_64-2.7/psutil/_psutil_posix.o
gcc -pthread -shared build/temp.linux-x86_64-2.7/psutil/_psutil_posix.o -L/usr/lib -lpython2.7 -o build/lib.linux-x86_64-2.7/_psutil_posix.so
copying build/lib.linux-x86_64-2.7/_psutil_linux.so -> 
copying build/lib.linux-x86_64-2.7/_psutil_posix.so -> 

checking Python environment is Mozilla virtualenv... Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/sources/mozjs-38.0.0/python/mozbuild/mozbuild/base.py", line 17, in <module>
    from mach.mixin.process import ProcessExecutionMixin
  File "/sources/mozjs-38.0.0/python/mach/mach/mixin/process.py", line 29, in <module>
    raise Exception('Could not detect environment shell!')
Exception: Could not detect environment shell!
configure: error: Python environment does not appear to be sane.
------ config.log ------
configure:3116:1: warning: incompatible implicit declaration of built-in function 'exit'
configure:3116:1: note: include '<stdlib.h>' or provide a declaration of 'exit'
configure:3139: checking for ranlib
configure:3171: checking for as
configure:3225: checking for ar
configure:3260: checking for ld
configure:3295: checking for strip
configure:3330: checking for windres
configure:3946: checking how to run the C preprocessor
configure:3967: gcc -E  conftest.c >/dev/null 2>conftest.out
configure:4026: checking how to run the C++ preprocessor
configure:4044: c++ -E  conftest.C >/dev/null 2>conftest.out
configure:4166: checking for sb-conf
configure:4166: checking for ve
configure:4228: checking for a BSD compatible install
configure:4281: checking whether ln -s works
configure:4303: checking for tar archiver
configure:4309: checking for gnutar
configure:4309: checking for gtar
configure:4309: checking for tar
configure:4346: checking for minimum required perl version >= 5.006
configure:4356: checking for full perl installation
configure:4374: checking for python2.7
configure:4484: checking Python environment is Mozilla virtualenv
configure: error: Python environment does not appear to be sane.

$export SHELL=/bin/bash