* guix-download.in: New file.
* configure.ac: Emit `guix-download' and make it executable.
* Makefile.am (bin_SCRIPTS): Add `guix-download'.
* po/POTFILES.in: Add `guix-download.in'.

* guix/store.scm (write-arg, read-arg): Add `base16' literal and
  corresponding rule.
  (query-path-hash): New operation.

* tests/derivations.scm ("fixed-output derivation"): Check whether
  `query-path-hash' returns a bytevector.

* distro/packages/base.scm (%static-inputs): Add an `awk' -> `gawk', and
  `sh' -> `bash' symlinks.  Add `fgrep' and `egrep'.
  (%bootstrap-coreutils&co): Use new tarball that contains that
  symlink.

* distro/packages/bootstrap/x86_64-linux/bash,
  distro/packages/bootstrap/x86_64-linux/mkdir,
  distro/packages/bootstrap/x86_64-linux/tar,
  distro/packages/bootstrap/x86_64-linux/xz: Use binaries from that
  tarball (the previous binaries hadn't gone through
  `remove-store-references', which is fixed now.)

* guix-build.in (%default-options): Add `substitutes?'.
  (show-help): Change `--local-build' to `--no-substitutes'.
  (guix-build): Adjust accordingly.

* distro/packages/base.scm (%bootstrap-binutils): Update remote file
  name.

* guix/derivations.scm (imported-files)[parent-dirs]: Move to...
  (parent-directories): ... here.  New procedure.
  (compiled-modules): New procedure.
  (build-expression->derivation): Use it.

* tests/derivations.scm ("build-expression->derivation with modules"):
  New test.

* distro/packages/base.scm (%bootstrap-glibc): Update initial regexp to
  make it less Nixish.  Update hash to new tarball.

* distro/packages/base.scm (%glibc-stripped): Include required headers
  from Linux-Libre.

* distro/packages/base.scm (gcc-4.7): Define
  STANDARD_STARTFILE_PREFIX_[12] instead of storing the absolute path of
  crt files.

* distro/packages/base.scm (%gcc-stripped): Copy $gcc/libexec to $out.

* distro/packages/base.scm (%glibc-stripped): Fix regexp to
  include *.so.* in the output.

* distro/packages/base.scm (%gcc-static): New variable.
  (%gcc-stripped): Use it.

* distro/packages/base.scm (%bootstrap-glibc): New variable.

* distro/packages/base.scm (package-from-tarball): New procedure.
  (%bootstrap-base-url, %bootstrap-coreutils&co, %bootstrap-binutils):
  New variables.

* guix/packages.scm (package-derivation)[intern]: New procedure.  Pass
  #t as the `recursive?' argument, instead of #f.
  [expand-input]: New procedure, with code formerly in the body.
  Support inputs where the input is a procedure returning a file name or
  an <origin>.
  Use `expand-input' in the body.

* tests/packages.scm ("trivial with system-dependent input"): New test.

* distro/packages/base.scm (%gcc-stripped, %gcc-bootstrap-tarball): New
  variables.

* distro/packages/base.scm (%glibc-stripped, %glibc-bootstrap-tarball):
  New variables.

* distro/packages/base.scm (%binutils-static, %binutils-static-stripped,
  %binutils-bootstrap-tarball): New variables.

* distro/packages/base.scm (tarball-package): New procedure.
  (%bootstrap-binaries-tarball): New variable.
  (%guile-bootstrap-tarball): Define in terms of `tarball-package'.

* guix-build.in (derivations-from-package-expressions): New `system'
  parameter.  Pass it to `package-derivation'.
  (%default-options): Add `system' pair.
  (show-help): Describe `--system'.
  (%options): Add it.
  (guix-build): Check the `system' pair in OPTS; pass it to
  `derivations-from-package-expressions' and `package-derivation'.

* distro/packages/base.scm (%bootstrap-guile): Error out when
  `search-bootstrap-binary' returns #f.

* distro/packages/base.scm (bootstrap-origin,
  package-with-bootstrap-guile): New procedures.
  (gnu-make-boot0, diffutils-boot0, findutils-boot0, binutils-boot0,
  gcc-boot0, linux-libre-headers-boot0, glibc-final, bash-final,
  guile-final): Use `package-with-bootstrap-guile'.
  (gcc-boot0-wrapped): Clear `source'.

* guix/ftp.scm (ftp-fetch): Add a #:guile keyword parameter.  Honor it.
* guix/http.scm (http-fetch): Likewise.

* guix/build/http.scm (open-connection-for-uri): New procedure.
  (http-fetch): Use it.  Pass the result as a #:port argument to
  `http-get'.
  Add hack to modify the `set-port-encoding!' binding in (web response).

* guix/ftp-client.scm (ftp-open): Add optional `port' parameter,
  defaulting to 21.  When calling `getaddrinfo', convert PORT to a
  string and pass AI_NUMERICSERV when PORT is a number.

* guix-build.in (show-help): Add `--local-build'.
  (%options): Likewise.
  (guix-build): Pass `set-build-options' the #:use-substitutes? argument
  accordingly.

* distro/packages/base.scm (bzip2): Use `find-files' instead of rolling
  our own with `file-system-fold'.

* distro/packages/base.scm (%static-binaries): Add missing
  use of (guix build utils).

* distro/packages/base.scm (gcc-boot0-wrapped): Fix typo introduced in
  a52e429f ("distro: Add i686 support.")

* distro/packages/base.scm (%static-binaries): Clear references to the
  store path for files in $out/bin.

* guix/build/utils.scm (find-files): New procedure.

* guix/build/utils.scm (copy-recursively): New procedure.

* distro/packages/base.scm (%guile-static-stripped): Use it.

* guix/build/utils.scm (mkdir-p): New procedure.

* distro/packages/base.scm (gnu-make-boot0, gcc-boot0-wrapped,
  ld-wrapper-boot3, %static-binaries, %guile-static-stripped): Use it.
* distro/packages/typesetting.scm (lout): Likewise.

* guix/build-system/gnu.scm (gnu-build)[builder]: Pass SYSTEM to
  `gnu-build' as a keyword argument.

* distro/packages/base.scm (gcc-4.7): Turn `arguments' into a lambda.
  Use `glibc-dynamic-linker' instead of the hard-coded linker name.

* distro/packages/base.scm (linux-headers): Rename to...
  (linux-libre-headers): ... this.  Change `name', `source', and
  `description', and `home-page' accordingly.  Update users.
  (linux-headers-boot0): Rename to...
  (linux-libre-headers-boot0): ... this.  Update users.

* distro/packages/base.scm (%bootstrap-guile): Build from a tarball
  containing a pre-built Guile.

* distro.scm (%bootstrap-binaries-directory): New variable.
  (search-bootstrap-binary): New procedure.

* Makefile.am (bootstrapdir, bootstrap_x86_64_linuxdir,
  dist_bootstrap_x86_64_linux_DATA, DISTCLEANFILES, DOWNLOAD_FILE): New
  variables.
  (distro/packages/bootstrap/x86_64-linux/guile-bootstrap-2.0.6.tar.xz):
  New rule.
  (EXTRA_DIST): Add `build-aux/download.scm'.
  (.scm.go): Define the `DISTRO_BOOTSTRAP_DIRECTORY' and
  `DISTRO_INSTALLED_BOOTSTRAP_DIRECTORY' environment variables.

* pre-inst-env.in: Define `DISTRO_BOOTSTRAP_DIRECTORY'.

* build-aux/download.scm: New file.
* distro/packages/bootstrap/x86_64-linux/{bash, mkdir, tar, xz}: New
  files.

* distro/packages/base.scm (%guile-static-stripped): New variable.

* distro/patches/guile-default-utf8.patch: New file.
* Makefile.am (dist_patch_DATA): Add it.

* distro/packages/base.scm (%guile-static): Use it.
  (%guile-static-stripped): Add call to `remove-store-references'.

* distro/patches/guile-relocatable.patch: Change to use /proc/self/exe
  instead of PROGRAM_INVOCATION_NAME.  Useful because Nix itself passes
  just the basename of builders that it executes.

* Makefile.am (TESTS_ENVIRONMENT): Remove.
  (LOG_COMPILER): Use `pre-inst-env'.

* release.nix (tarball)[buildNativeInputs]: Add `texinfo'.