Error

these derivations will be built:
  /nix/store/m4n8gb7lqf5hh1i75jvlhv4y6xhgkrm8-plv8-2.0.3.drv
building path(s) ‘/nix/store/vg2rrp3gm2pvd37f4l3rswk5ifwccjis-plv8-2.0.3’
unpacking sources
unpacking source archive /nix/store/m0j031d2cgma0qzpvzgqkwy5f05cs36i-plv8-v2.0.3-src
source root is plv8-v2.0.3-src
patching sources
configuring
no configure script, doing nothing
building
build flags: SHELL=/nix/store/lhc4zbhdf0gdwkplxyfij7ggly8mq2ka-bash-4.4-p12/bin/bash CUSTOM_CC=cc
Makefile:176: /nix/store/v89bkyprv6mghmxv0mnsn4jkh80s8iqf-postgresql-9.6.5/lib/pgxs/src/makefiles/pgxs.mk: No such file or directory
make: *** No rule to make target '/nix/store/v89bkyprv6mghmxv0mnsn4jkh80s8iqf-postgresql-9.6.5/lib/pgxs/src/makefiles/pgxs.mk'.  Stop.
builder for ‘/nix/store/m4n8gb7lqf5hh1i75jvlhv4y6xhgkrm8-plv8-2.0.3.drv’ failed with exit code 2
error: build of ‘/nix/store/m4n8gb7lqf5hh1i75jvlhv4y6xhgkrm8-plv8-2.0.3.drv’ failed