* guix/packages.scm (package-derivation): Add all non-derivation paths
  to the store.

* guix/packages.scm (package-derivation): Allow non-derivation store
  paths as inputs.

* release.nix: Add `preConfigure' and `__noChroot' attributes.

* Makefile.am (AM_DISTCHECK_CONFIGURE_FLAGS): New variable.
* configure.ac: Define and substitute `NIX_PREFIX'.

* Makefile.am (EXTRA_DIST): Add `tests/test.drv'.

* Makefile.am (.scm.go): Define $NIX_INSTANTIATE.
  (TESTS_ENVIRONMENT): Likewise, and define $NIX_HASH.
* guix/utils.scm (nixpkgs-derivation): Use $NIX_INSTANTIATE when
  defined.

* tests/utils.scm (%nix-hash): New variable.
  ("sha256 & bytevector->nix-base32-string"): Use it.

* Makefile.am (MODULES): Add `srfi/srfi-64.scm' and
  `srfi/srfi-64.upstream.scm'.

* release.nix: New file.
* Makefile.am (EXTRA_DIST): Add it.

* distro/base.scm (mpc): New variable.

* distro/base.scm (mpfr): New variable.

* distro/base.scm (recutils): New variable.

* distro/base.scm (libffi): New variable.
  (guile-2.0): Use it.

* distro/base.scm (ncurses): New variable.
  (readline): Use it.

* distro/base.scm (readline): New variable.
  (guile-1.8, guile-2.0): Use it.

* distro/readline-link-ncurses.patch: New file.
* Makefile.am (nobase_dist_guilemodule_DATA): Add it.

* guix-build.in (guix-build): Use (current-processor-count) build cores
  by default.

* guix/utils.scm (nixpkgs-derivation*): New macro.

* distro/base.scm: Use it instead of `nixpkgs-derivation'.

* distro/base.scm (libunistring): New variable.
  (guile-2.0): Use it.

* distro/base.scm (libtool): New variable.
  (guile-1.8, guile-2.0): Use it.

* distro/base.scm (gmp): New variable.
  (guile-1.8, guile-2.0): Use it.

* distro/base.scm (m4): New variable.

* distro/m4-readlink-EINVAL.patch, distro/m4-s_isdir.patch: New files.
* Makefile.am (nobase_dist_guilemodule_DATA): Add them.

* configure.ac: Use Automake's `gnu' option.
* ChangeLog, NEWS: New files.

* Makefile.am (TESTS_ENVIRONMENT): Remove `guile' invocation.  Add
  semicolons, and export the variables as shown in the Automake 1.12
  manual.
  (LOG_COMPILER): New variable, with `guile' invocation.

* po/Makevars (XGETTEXT_OPTIONS): Add `--from-code=UTF-8'.

* distro/base.scm (guile-reader): New procedure.
  (guile-reader/guile-1.8, guile-reader/guile-2.0): New variables.

* guix/derivations.scm (build-expression->derivation)[prolog]: Unset
  `LD_LIBRARY_PATH'.

* guix/build-system/gnu.scm (%standard-inputs): Add "findutils".

* distro/base.scm (guile-2.0): Propagate libunistring and Libtool.

* distro/base.scm (guile-1.8): Propagate GMP and Libtool.

* guix/packages.scm (package-transitive-inputs): New procedure.
  (package-derivation): Use it to compute INPUTS.

* tests/packages.scm (dummy-package): New macro.
  ("package-transitive-inputs"): New test.

* distro/base.scm (guile-2.0): New variable.

* guix/build/gnu-build-system.scm (set-paths): Add `PKG_CONFIG_PATH'.

* distro/base.scm (lout): New variable.

* guix/build-system/gnu.scm (gnu-build): Add `tests?' parameter.
  [builder]: Inherit it.

* guix/build/utils.scm (substitute): Restore FILE's mode before renaming
  TEMPLATE.

* guix/build/utils.scm (substitute): Change to accept a `pattern+procs'
  parameter.  Iterate over it.
  (substitute*): Adjust accordingly.

* distro/base.scm (guile-1.8): Adjust accordingly.

* distro/base.scm (gawk): Explicitly disable parallel tests.

* guix-build.in (leave): New macro, formerly in `guix-build'.
  (show-help): Document `--cores'.
  (%options): Add `--cores'.
  (guix-build): Remove `leave' macro from here.  Pass the `cores' option
  value to `set-build-options'.

* guix/build/gnu-build-system.scm (build): Add `parallel-build?'
  parameter; honor it and $NIX_BUILD_CORES.
  (check): Add `parallel-tests?' parameter; likewise.

* guix/build-system/gnu.scm (gnu-build): Add `parallel-build?' and
  `parallel-tests?' parameters.
  [builder]: Inherit them.

* guix/build/utils.scm (let-matches, substitute*): New macros.

* distro/base.scm (guile-1.8): Use `substitute*' instead of
  `substitute'.  Remove the #:modules argument.