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__ */
t/gnu/packages/node.scm?id=9097f994483dc8abb786fb3b8ad5cc73484e9f24'>commit</a><a href='/guix/diff/gnu/packages/node.scm?id=9097f994483dc8abb786fb3b8ad5cc73484e9f24'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/node.scm'>
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<tr><td><span title='2020-03-04 23:16:17 +0100'>2020-03-04</span></td><td><a href='/guix/commit/gnu/packages/node.scm?id=ebb7cf9e21060105d9950dd5142c0eb918083666'>Merge branch 'master' into core-updates</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-02-26 21:52:47 +0100'>2020-02-26</span></td><td><a href='/guix/commit/gnu/packages/node.scm?id=5cfc6a88e9fbb9f34855ebd43264266b0201ce50'>gnu: node: Disable failing tests on armhf-linux.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/node.scm (node)[arguments]: When building on
armhf-linux, disable several zlib tests.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-02-26 21:52:47 +0100'>2020-02-26</span></td><td><a href='/guix/commit/gnu/packages/node.scm?id=458c3ff552005cbf69ed4a1daee3529214ae73cf'>gnu: node: Update to 10.19.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/node.scm (node): Update to 10.19.0.
[inputs]: Remove LIBUV and NGHTTP2:LIB.  Add LIBUV/LATEST and
NGHTTP2-1.40:LIB.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-02-24 17:10:22 +0100'>2020-02-24</span></td><td><a href='/guix/commit/gnu/packages/node.scm?id=b4481f2df1ac0e24a41a06671e99e88a5e2c9d2d'>gnu: node: Increase build timeouts.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/node.scm (node)[properties]: Add MAX-SILENT-TIME.  Increase
TIMEOUT from 3600 seconds to 14400.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-02-14 19:05:45 +0100'>2020-02-14</span></td><td><a href='/guix/commit/gnu/packages/node.scm?id=7edafc884c2a21258541b17a231051702c458263'>Merge branch 'master' into core-updates</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-02-10 20:18:05 +0100'>2020-02-10</span></td><td><a href='/guix/commit/gnu/packages/node.scm?id=51583265394fdab4fecf2710dcf142cd3793c692'>gnu: node: Disable flaky test.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/node.scm (node)[arguments]: Delete test that fails sporadically.
</span></span></td><td>Marius Bakke</td></tr>