As for libc's `system', change Awk to look for `sh' in $PATH.  This patch is
only meant to be used during bootstrapping, where we don't know in advance the
absolute file name of `sh'.

--- gawk-4.1.3/io.c	2015-05-19 15:37:20.000000000 +0200
+++ gawk-4.1.3/io.c	2015-06-09 18:39:36.918414881 +0200
@@ -2025,7 +2025,7 @@
 
 		set_sigpipe_to_default();
 
-		execl("/bin/sh", "sh", "-c", command, NULL);
+		execlp("sh", "sh", "-c", command, NULL);
 		_exit(errno == ENOENT ? 127 : 126);
 
 	case -1:
@@ -2077,7 +2077,7 @@
 
 		signal(SIGPIPE, SIG_DFL);
 
-		execl("/bin/sh", "sh", "-c", command, NULL);
+		execlp("sh", "sh", "-c", command, NULL);
 		_exit(errno == ENOENT ? 127 : 126);
 
 	case -1:
@@ -2422,7 +2422,7 @@
 			fatal(_("close of pipe failed (%s)"), strerror(errno));
 		/* stderr does NOT get dup'ed onto child's stdout */
 		set_sigpipe_to_default();
-		execl("/bin/sh", "sh", "-c", str, NULL);
+		execlp("sh", "sh", "-c", str, NULL);
 		_exit(errno == ENOENT ? 127 : 126);
 	}
 #endif /* NOT __EMX__, NOT __MINGW32__ */
@@ -2659,7 +2659,7 @@
 		if (close(p[0]) == -1 || close(p[1]) == -1)
 			fatal(_("close of pipe failed (%s)"), strerror(errno));
 		set_sigpipe_to_default();
-		execl("/bin/sh", "sh", "-c", cmd, NULL);
+		execlp("sh", "sh", "-c", cmd, NULL);
 		_exit(errno == ENOENT ? 127 : 126);
 	}
 #endif /* NOT __EMX__, NOT __MINGW32__ */
f84061342d62d86fcc2093dd6c'>tree</a><a href='/guix/commit/build-aux/compile-as-derivation.scm?id=b3ee04cde70579f84061342d62d86fcc2093dd6c'>commit</a><a href='/guix/diff/build-aux/compile-as-derivation.scm?id=b3ee04cde70579f84061342d62d86fcc2093dd6c'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/build-aux/compile-as-derivation.scm'>
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<div class='path'>path: <a href='/guix/log/?id=b3ee04cde70579f84061342d62d86fcc2093dd6c'>root</a>/<a href='/guix/log/build-aux?id=b3ee04cde70579f84061342d62d86fcc2093dd6c'>build-aux</a>/<a href='/guix/log/build-aux/compile-as-derivation.scm?id=b3ee04cde70579f84061342d62d86fcc2093dd6c'>compile-as-derivation.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/build-aux/compile-as-derivation.scm?id=b3ee04cde70579f84061342d62d86fcc2093dd6c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-09-02 15:43:51 +0200'>2018-09-02</span></td><td><a href='/guix/commit/build-aux/compile-as-derivation.scm?id=20cbd4f5f4d08bc26c22eb40b6c1e55b02e93f23'>compile-as-derivation: Adjust %load-compiled-path.</a><span class='msg-avail'>...<span class='msg-tooltip'>* build-aux/compile-as-derivation.scm: Set not only %load-path but also
%load-compiled-path.  This can avoid problems where a stale .go is
loaded.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-09 12:02:27 +0200'>2018-06-09</span></td><td><a href='/guix/commit/build-aux/compile-as-derivation.scm?id=75e24d7b0e19ab2164aecb340e82d07d2b9714e7'>pull: Install the new Guix in a profile.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/pull.scm (%pull-version): New variable.
(build-from-source): Pass #:pull-version to BUILD.
(whole-package-for-legacy, derivation-&gt;manifest-entry): New procedure.
(build-and-install): Rewrite in terms of 'build-and-use-profile'.
* guix/scripts/system.scm (maybe-suggest-running-guix-pull)[latest]:
Switch to "/current".
* scripts/guix.in (augment-load-paths!): Remove use of
~/.config/guix/latest.
* build-aux/compile-as-derivation.scm: Replace "/guix/latest/" with
"/current/share/guile/site/X.Y"
* guix/scripts.scm (warn-about-old-distro)[age]: Check "/current"
instead of "/latest".
* doc/guix.texi (Invoking guix pull): Document it.
* doc/contributing.texi (Running Guix Before It Is Installed): Remove
footnote about abusing ~/.config/guix/latest.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-09 12:02:27 +0200'>2018-06-09</span></td><td><a href='/guix/commit/build-aux/compile-as-derivation.scm?id=8a0d9bc8a3f153159d9e239a151c0fa98f1e12d8'>self: Produce a complete package with the 'guix' command.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/self.scm (guix-command): New procedure.
(compiled-guix): Add #:pull-version parameter.
[command, package]: New variables.
Honor PULL-VERSION.
(guix-derivation): Add #:pull-version and pass it to 'compiled-guix'.
* build-aux/build-self.scm (build-program): Add #:pull-version
parameter.  Pass it to 'guix-derivation'.
(build): Add #:pull-version and pass it to 'build-program'.
* build-aux/compile-as-derivation.scm: Pass #:pull-version to BUILD.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-04-08 17:48:25 +0200'>2018-04-08</span></td><td><a href='/guix/commit/build-aux/compile-as-derivation.scm?id=2cfc8d69644af6c53fed9128425e8ff70ad4509f'>build: Add 'as-derivation' target.</a><span class='msg-avail'>...<span class='msg-tooltip'>* build-aux/compile-as-derivation.scm: New file.
* Makefile.am (as-derivation): New target.
(EXTRA_DIST): Add compile-as-derivation.scm.
</span></span></td><td>Ludovic Courtès</td></tr>