[owner@Taha-Desktop-Linux:~/Downloads/tmpdev/nixpkgs/pkgs/applications/misc/hello]$ nix-env -f $NIXPKGS -i hello
installing 'hello-2.10'
these derivations will be built:
  /nix/store/s6gjb6i11r1vx1wj5lsam0qjih9lxqhi-0.5.0.tar.gz.drv
  /nix/store/4rwrppk2hskhyayqh9ag9mrqs9zn2l6p-hello-2.10.drv
these paths will be fetched (20.99 MiB download, 221.55 MiB unpacked):
  /nix/store/0yaiablzxhd8ki5qan156ydz78grlav7-nghttp2-1.32.0-bin
  /nix/store/30770skb6wniwr8k2x29h2nkxsn6hknv-gnumake-4.2.1
  /nix/store/3rbjgck4hfsrixr3d1h8c6vdl1m7xigz-stdenv-linux
  /nix/store/4bikvz91b83sycavf35lmby65m6zxgch-libssh2-1.8.0-dev
  /nix/store/4llb9qyny8b6221clwk4a75igfc1bwbl-binutils-wrapper-2.30
  /nix/store/4qvrxzxa535y8304mk195x50b6p9607d-binutils-2.30
  /nix/store/5xnniwzazzlg6qinhrwammxxwsq5c1di-nghttp2-1.32.0-dev
  /nix/store/615hqc9nn4pxxb8a7l61ylanmhn64gny-paxctl-0.9
  /nix/store/7l1smzwil1kxyyfayzl6lg1hw9m4iwmw-nghttp2-1.32.0
  /nix/store/bcrwa5b8z54xrl95ipfrq6nqhb0530yi-stdenv-linux
  /nix/store/d6cnw2lkarcx6h7jacla9pb8bfygax4j-expand-response-params
  /nix/store/ffv38nyln4snd2bz7ydz0asq1db9yxb2-c-ares-1.14.0
  /nix/store/hcmwqnqj3xhirg1hdwavhvv2d32mw08g-patchelf-0.9
  /nix/store/jg9yh6cm4iwcpl4l18g7mr9y7sdwav5q-curl-7.60.0-dev
  /nix/store/xhfjqkhm8jr3qiy4q1xy5110161bj1a2-mirrors-list
  /nix/store/yz6kinf4ia19r1c14yirl6x4ciwgzk67-gcc-wrapper-7.3.0
copying path '/nix/store/d6cnw2lkarcx6h7jacla9pb8bfygax4j-expand-response-params' from 'https://cache.nixos.org'...
copying path '/nix/store/30770skb6wniwr8k2x29h2nkxsn6hknv-gnumake-4.2.1' from 'https://cache.nixos.org'...
copying path '/nix/store/hcmwqnqj3xhirg1hdwavhvv2d32mw08g-patchelf-0.9' from 'https://cache.nixos.org'...
copying path '/nix/store/xhfjqkhm8jr3qiy4q1xy5110161bj1a2-mirrors-list' from 'https://cache.nixos.org'...
copying path '/nix/store/4qvrxzxa535y8304mk195x50b6p9607d-binutils-2.30' from 'https://cache.nixos.org'...
copying path '/nix/store/ffv38nyln4snd2bz7ydz0asq1db9yxb2-c-ares-1.14.0' from 'https://cache.nixos.org'...
copying path '/nix/store/4bikvz91b83sycavf35lmby65m6zxgch-libssh2-1.8.0-dev' from 'https://cache.nixos.org'...
copying path '/nix/store/7l1smzwil1kxyyfayzl6lg1hw9m4iwmw-nghttp2-1.32.0' from 'https://cache.nixos.org'...
copying path '/nix/store/615hqc9nn4pxxb8a7l61ylanmhn64gny-paxctl-0.9' from 'https://cache.nixos.org'...
copying path '/nix/store/0yaiablzxhd8ki5qan156ydz78grlav7-nghttp2-1.32.0-bin' from 'https://cache.nixos.org'...
copying path '/nix/store/3rbjgck4hfsrixr3d1h8c6vdl1m7xigz-stdenv-linux' from 'https://cache.nixos.org'...
copying path '/nix/store/5xnniwzazzlg6qinhrwammxxwsq5c1di-nghttp2-1.32.0-dev' from 'https://cache.nixos.org'...
copying path '/nix/store/jg9yh6cm4iwcpl4l18g7mr9y7sdwav5q-curl-7.60.0-dev' from 'https://cache.nixos.org'...
building '/nix/store/s6gjb6i11r1vx1wj5lsam0qjih9lxqhi-0.5.0.tar.gz.drv'...

trying https://github.com/wertarbyte/triggerhappy/archive/release/0.5.0.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   138    0   138    0     0    505      0 --:--:-- --:--:-- --:--:--   503
100 29841  100 29841    0     0  39007      0 --:--:-- --:--:-- --:--:-- 39007
copying path '/nix/store/4llb9qyny8b6221clwk4a75igfc1bwbl-binutils-wrapper-2.30' from 'https://cache.nixos.org'...
copying path '/nix/store/yz6kinf4ia19r1c14yirl6x4ciwgzk67-gcc-wrapper-7.3.0' from 'https://cache.nixos.org'...
copying path '/nix/store/bcrwa5b8z54xrl95ipfrq6nqhb0530yi-stdenv-linux' from 'https://cache.nixos.org'...
building '/nix/store/4rwrppk2hskhyayqh9ag9mrqs9zn2l6p-hello-2.10.drv'...
unpacking sources
unpacking source archive /nix/store/sl31cammv9x5687ss56pgiahinpivkxy-0.5.0.tar.gz
source root is triggerhappy-release-0.5.0
setting SOURCE_DATE_EPOCH to timestamp 1473169590 of file triggerhappy-release-0.5.0/version.inc
patching sources
configuring
no configure script, doing nothing
building
build flags: SHELL=/nix/store/8zkg9ac4s4alzyf4a8kfrig1j73z66dw-bash-4.4-p23/bin/bash
gcc -M -MG  -o cmdsocket.d cmdsocket.c
gcc -M -MG  -o th-cmd.d th-cmd.c
gcc -M -MG  -o triggerparser.d triggerparser.c
gcc -M -MG  -o uinput.d uinput.c
gcc -M -MG  -o ignore.d ignore.c
gcc -M -MG  -o obey.d obey.c
gcc -M -MG  -o devices.d devices.c
gcc -M -MG  -o eventnames.d eventnames.c
gcc -M -MG  -o trigger.d trigger.c
gcc -M -MG  -o keystate.d keystate.c
gcc -M -MG  -o thd.d thd.c
sed -r 's!(.*)!#define TH_VERSION "\1"!' version.inc > version.h
gcc    -c -o thd.o thd.c
gcc    -c -o keystate.o keystate.c
gcc    -c -o trigger.o trigger.c
trigger.c: In function 'run_triggers':
trigger.c:230:6: warning: ignoring return value of 'system', declared with attribute warn_unused_result [-Wunused-result]
      system(et->action);
      ^~~~~~~~~~~~~~~~~~
echo "#include <linux/input.h>" | gcc  -dM -E - > linux_input_defs_gen.inc
awk '/^#define EV_/ && $2 !~ /_(MIN_INTERESTING|MAX|CNT|VERSION)$/ {print "EV_MAP("$2"),"}' linux_input_defs_gen.inc > evtable_EV.inc
awk '/^#define KEY_/ && $2 !~ /_(MIN_INTERESTING|MAX|CNT|VERSION)$/ {print "EV_MAP("$2"),"}' linux_input_defs_gen.inc > evtable_KEY.inc
awk '/^#define BTN_/ && $2 !~ /_(MIN_INTERESTING|MAX|CNT|VERSION)$/ {print "EV_MAP("$2"),"}' linux_input_defs_gen.inc > evtable_BTN.inc
awk '/^#define REL_/ && $2 !~ /_(MIN_INTERESTING|MAX|CNT|VERSION)$/ {print "EV_MAP("$2"),"}' linux_input_defs_gen.inc > evtable_REL.inc
awk '/^#define ABS_/ && $2 !~ /_(MIN_INTERESTING|MAX|CNT|VERSION)$/ {print "EV_MAP("$2"),"}' linux_input_defs_gen.inc > evtable_ABS.inc
awk '/^#define SW_/ && $2 !~ /_(MIN_INTERESTING|MAX|CNT|VERSION)$/ {print "EV_MAP("$2"),"}' linux_input_defs_gen.inc > evtable_SW.inc
gcc    -c -o eventnames.o eventnames.c
gcc    -c -o devices.o devices.c
gcc    -c -o cmdsocket.o cmdsocket.c
gcc    -c -o obey.o obey.c
gcc    -c -o ignore.o ignore.c
gcc    -c -o uinput.o uinput.c
gcc    -c -o triggerparser.o triggerparser.c
gcc   thd.o keystate.o trigger.o eventnames.o devices.o cmdsocket.o obey.o ignore.o uinput.o triggerparser.o   -o thd
gcc    -c -o th-cmd.o th-cmd.c
gcc   th-cmd.o cmdsocket.o   -o th-cmd
pod2man \
        --center="Triggerhappy daemon" \
        --section=1 \
        --release="0.5.0" \
        thd.pod > thd.1
pod2man \
        --center="Triggerhappy daemon" \
        --section=1 \
        --release="0.5.0" \
        th-cmd.pod > th-cmd.1
installing
install flags: SHELL=/nix/store/8zkg9ac4s4alzyf4a8kfrig1j73z66dw-bash-4.4-p23/bin/bash DESTDIR=\$\(out\) install
install -D thd /nix/store/w5fii7yk82qadgh1ls5bqkrdr3p1qw7q-hello-2.10//usr//bin//thd
install -D th-cmd /nix/store/w5fii7yk82qadgh1ls5bqkrdr3p1qw7q-hello-2.10//usr//bin//th-cmd
install -D thd.1 /nix/store/w5fii7yk82qadgh1ls5bqkrdr3p1qw7q-hello-2.10//usr//share/man/man1//thd.1
install -D th-cmd.1 /nix/store/w5fii7yk82qadgh1ls5bqkrdr3p1qw7q-hello-2.10//usr//share/man/man1//th-cmd.1
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/w5fii7yk82qadgh1ls5bqkrdr3p1qw7q-hello-2.10
shrinking /nix/store/w5fii7yk82qadgh1ls5bqkrdr3p1qw7q-hello-2.10/usr/bin/thd
shrinking /nix/store/w5fii7yk82qadgh1ls5bqkrdr3p1qw7q-hello-2.10/usr/bin/th-cmd
strip is /nix/store/4qvrxzxa535y8304mk195x50b6p9607d-binutils-2.30/bin/strip
patching script interpreter paths in /nix/store/w5fii7yk82qadgh1ls5bqkrdr3p1qw7q-hello-2.10
checking for references to /tmp/nix-build-hello-2.10.drv-0 in /nix/store/w5fii7yk82qadgh1ls5bqkrdr3p1qw7q-hello-2.10...
building '/nix/store/ks6331ljwnq0giavmsk1w03fxnr96lac-user-environment.drv'...
created 1 symlinks in user environment