Skip tests that rely on the `amhello' tarball that comes with Automake.
That tarball's `configure' uses #!/bin/sh, but we can't easily patch it.

diff --git a/t/amhello-binpkg.sh b/t/amhello-binpkg.sh
index fa88cc6..d988cee 100755
--- a/t/amhello-binpkg.sh
+++ b/t/amhello-binpkg.sh
@@ -17,6 +17,7 @@
 # Test an example from the manual about the 'amhello' package:
 # using DESTDIR to build simple, no-frills binary packages.
 
+exit 77
 am_create_testdir=empty
 . ./defs || exit 1
 
diff --git a/t/amhello-cflags.sh b/t/amhello-cflags.sh
index 666011f..2a95e3c 100755
--- a/t/amhello-cflags.sh
+++ b/t/amhello-cflags.sh
@@ -18,6 +18,7 @@
 # using VPATH builds to configure the same package with different
 # options.
 
+exit 77
 am_create_testdir=empty
 required=gcc
 . ./defs || exit 1
diff --git a/t/amhello-cross-compile.sh b/t/amhello-cross-compile.sh
index 708abda..2ee4292 100755
--- a/t/amhello-cross-compile.sh
+++ b/t/amhello-cross-compile.sh
@@ -17,6 +17,7 @@
 # Test an example from the manual about the 'amhello' package:
 # cross-compiling a package from Linux/Unix to MinGW.
 
+exit 77
 am_create_testdir=empty
 required=i586-mingw32msvc-gcc
 . ./defs || exit 1
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<div class='path'>path: <a href='/guix/log/?id=2e821717d34a24fec2422913f0c4fb975b86b0f4'>root</a>/<a href='/guix/log/gnu?id=2e821717d34a24fec2422913f0c4fb975b86b0f4'>gnu</a>/<a href='/guix/log/gnu/build?id=2e821717d34a24fec2422913f0c4fb975b86b0f4'>build</a>/<a href='/guix/log/gnu/build/chromium-extension.scm?id=2e821717d34a24fec2422913f0c4fb975b86b0f4'>chromium-extension.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/gnu/build/chromium-extension.scm?id=2e821717d34a24fec2422913f0c4fb975b86b0f4&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-07-20 16:50:08 +0200'>2022-07-20</span></td><td><a href='/guix/commit/gnu/build/chromium-extension.scm?id=cda3de3b7de46346457e75eb7022bc76a34c2d4f'>gnu: modifying make-chromium-extension to rely on node-crx3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/chromium-extension.scm (make-crx): Lift Xorg and Chromium
dependencies, rely on node-crx3 instead.

Signed-off-by: Marius Bakke &lt;marius@gnu.org&gt;
</span></span></td><td>Nicolas Graves</td></tr>
<tr><td><span title='2021-12-23 03:07:34 +0100'>2021-12-23</span></td><td><a href='/guix/commit/gnu/build/chromium-extension.scm?id=a89d65eec1948cbcbf9936939906fae9cdabf1e7'>chromium-extension: Avoid another usage of the store-mapped /tmp.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/chromium-extension.scm (make-crx): Use a Chromium profile relative
to the build directory instead of /tmp.  While here, remove obsolete comment.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2021-12-16 22:21:13 +0100'>2021-12-16</span></td><td><a href='/guix/commit/gnu/build/chromium-extension.scm?id=aec6bd0169bb855a3ec70f5edec0701d0a66ce9d'>chromium-extension: Build .crx files in a deterministic fashion.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/chromium-extension.scm (make-crx): Pass #:keep-mtime? #t to
COPY-RECURSIVELY.  Remove defunct FAKETIME workaround.  While at it, pack the
extension in the scratch working directory instead of the transient
store-mapped /tmp.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2021-12-16 22:21:13 +0100'>2021-12-16</span></td><td><a href='/guix/commit/gnu/build/chromium-extension.scm?id=40ebf85b865cb942c2551bfdc2ca3065eb3d9186'>chromium-extension: Avoid usage of gcrypt at evaluation time.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/chromium-extension.scm (make-signing-key): Wrap builder in
with-extensions, and compute the seed checksum at build time.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2021-12-16 22:21:13 +0100'>2021-12-16</span></td><td><a href='/guix/commit/gnu/build/chromium-extension.scm?id=173860eb41102c5af2cfdc0404808075d5a5ff3a'>chromium-extension: Reduce imported-modules scope.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/chromium-extension.scm (make-crx): Delay with-imported-modules
until the builder code.
(crx-&gt;chromium-json): Remove needless define* while at it.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2021-12-16 22:21:13 +0100'>2021-12-16</span></td><td><a href='/guix/commit/gnu/build/chromium-extension.scm?id=f59bb27557ee8d115efb120292112387a6d23490'>chromium-extension: Simplify builder code.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/chromium-extension.scm (chromium-json-&gt;profile-object): Remove
variable.
(file-sha256): New variable.
(make-chromium-extension): Rename OUTPUT parameter to prevent conflict.
Adjust other variable names for clarity.
[inputs]: Clear.
[arguments]: Inline and simplify the final transformation with a gexp.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-11-08 18:21:15 +0100'>2020-11-08</span></td><td><a href='/guix/commit/gnu/build/chromium-extension.scm?id=d7a295b24b8b84ca3193d30249a01f292178105a'>Add (gnu build chromium-extension).</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/chromium-extension.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Adjust accordingly.
</span></span></td><td>Marius Bakke</td></tr>