When network issue occurs during `guix environment <package>' call, the error message is too cryptic:
$ guix environment gnash ;;; note: source file /Devel/git/guix/gnu/packages/dictionaries.scm ;;; newer than compiled /Devel/git/guix/gnu/packages/dictionaries.go ;;; note: source file /Devel/git/guix/gnu/packages/graphics.scm ;;; newer than compiled /Devel/git/guix/gnu/packages/graphics.go substitute-binary: guix substitute-binary: warning: failed to look up host 'hydra.gnu.org' (Temporary failure in name resolution), substituter disabled The following derivations will be built: /gnu/store/9z9bpm9pwhd3dwx5kfwwqbirfd3v6bn5-coreutils-8.23.tar.xz.drv /gnu/store/y1b1dvljiyz4s8r2bhp3ch9nijm8dnh6-coreutils-8.23.tar.xz.drv /gnu/store/0p2nh8j0ad1qsd2ipwhlp6zais1jbc3m-glib-2.42.1.tar.xz.drv /gnu/store/wmy3xalfpg9vw4awfflgl26mynxv7554-glib-2.42.1.tar.xz.drv /gnu/store/pph3srjx594rcq0cjah679rd5xc7nqi2-coreutils-8.23.drv /gnu/store/k4y35xga43ib54688i76n11phz1xhrnz-giflib-4.2.3.tar.bz2.drv starting download of `/gnu/store/xc4r4ym38y83i4ncdavrcg8h8m4vm499-giflib-4.2.3.tar.bz2' from `http://prdownloads.sourceforge.net/giflib/giflib-4.x/giflib-4.2.3.tar.bz2'.. . ERROR: In procedure getaddrinfo: Temporary failure in name resolution starting download of `/gnu/store/xc4r4ym38y83i4ncdavrcg8h8m4vm499-giflib-4.2.3.tar.bz2' from `http://heanet.dl.sourceforge.net/sourceforge/giflib/giflib-4.x/giflib-4.2.3. tar.bz2'... ERROR: In procedure getaddrinfo: Temporary failure in name resolution starting download of `/gnu/store/xc4r4ym38y83i4ncdavrcg8h8m4vm499-giflib-4.2.3.tar.bz2' from `http://surfnet.dl.sourceforge.net/sourceforge/giflib/giflib-4.x/giflib-4.2.3 .tar.bz2'... ERROR: In procedure getaddrinfo: Temporary failure in name resolution starting download of `/gnu/store/xc4r4ym38y83i4ncdavrcg8h8m4vm499-giflib-4.2.3.tar.bz2' from `http://dfn.dl.sourceforge.net/sourceforge/giflib/giflib-4.x/giflib-4.2.3.tar .bz2'... ERROR: In procedure getaddrinfo: Temporary failure in name resolution starting download of `/gnu/store/xc4r4ym38y83i4ncdavrcg8h8m4vm499-giflib-4.2.3.tar.bz2' from `http://mesh.dl.sourceforge.net/sourceforge/giflib/giflib-4.x/giflib-4.2.3.ta r.bz2'... ERROR: In procedure getaddrinfo: Temporary failure in name resolution starting download of `/gnu/store/xc4r4ym38y83i4ncdavrcg8h8m4vm499-giflib-4.2.3.tar.bz2' from `http://ovh.dl.sourceforge.net/sourceforge/giflib/giflib-4.x/giflib-4.2.3.tar .bz2'... ERROR: In procedure getaddrinfo: Temporary failure in name resolution starting download of `/gnu/store/xc4r4ym38y83i4ncdavrcg8h8m4vm499-giflib-4.2.3.tar.bz2' from `http://osdn.dl.sourceforge.net/sourceforge/giflib/giflib-4.x/giflib-4.2.3.ta r.bz2'... ERROR: In procedure getaddrinfo: Temporary failure in name resolution failed to download "/gnu/store/xc4r4ym38y83i4ncdavrcg8h8m4vm499-giflib-4.2.3.tar.bz2" from "mirror://sourceforge/giflib/giflib-4.x/giflib-4.2.3.tar.bz2" builder for `/gnu/store/k4y35xga43ib54688i76n11phz1xhrnz-giflib-4.2.3.tar.bz2.drv' failed to produce output path `/gnu/store/xc4r4ym38y83i4ncdavrcg8h8m4vm499-giflib-4.2.3 .tar.bz2' cannot build derivation `/gnu/store/z8f07h9gix3p33jqv6sckqd2ynn40mv5-giflib-4.2.3.drv': 1 dependencies couldn't be built Backtrace: In ice-9/boot-9.scm: 157: 14 [catch #t #<catch-closure 12fd7e0> ...] In unknown file: ?: 13 [apply-smob/1 #<catch-closure 12fd7e0>] In ice-9/boot-9.scm: 63: 12 [call-with-prompt prompt0 ...] In ice-9/eval.scm: 432: 11 [eval # #] In ice-9/boot-9.scm: 2401: 10 [save-module-excursion #<procedure 131a940 at ice-9/boot-9.scm:4045:3 ()>] 4050: 9 [#<procedure 131a940 at ice-9/boot-9.scm:4045:3 ()>] 1724: 8 [%start-stack load-stack ...] 1729: 7 [#<procedure 1332ea0 ()>] In unknown file: ?: 6 [primitive-load "/Devel/git/guix/scripts/guix"] In guix/ui.scm: 849: 5 [run-guix-command environment "gnash"] In guix/scripts/environment.scm: 224: 4 [guix-environment "gnash"] In guix/store.scm: 936: 3 [run-with-store # ...] In guix/scripts/environment.scm: 213: 2 [#<procedure 3d23e70 at guix/scripts/environment.scm:213:12 (state)> #] In guix/store.scm: 883: 1 [#<procedure 3d23c60 at guix/store.scm:882:28 (store)> #] 580: 0 [build-things # #] guix/store.scm:580:0: In procedure build-things: guix/store.scm:580:0: Throw to key `srfi-34' with args `(#<condition &nix-protocol-error [message: "build of `/gnu/store/z8f07h9gix3p33jqv6sckqd2ynn40mv5-giflib-4.2.3.drv ' failed" status: 1] 3d64ba0>)'.
