Purity: don't look for library dependencies (of the form `-lfoo') in
/lib and /usr/lib.  Likewise, when searching for included Makefiles,
don't look in /usr/include and friends.

Borrowed from similar patch for GNU Make and adjusted for Remake.

--- remake-4.3+dbg-1.5/src/read.c.orig	2020-03-14 17:06:16.000000000 -0500
+++ remake-4.3+dbg-1.5/src/read.c	2020-07-31 22:34:03.862383862 -0500
@@ -104,7 +104,7 @@
 # define INCLUDEDIR "."
 #endif
     INCLUDEDIR,
-#ifndef _AMIGA
+#if 0
     "/usr/gnu/include",
     "/usr/local/include",
     "/usr/include",
--- remake-4.3+dbg-1.5/src/remake.c.orig	2020-03-14 17:06:16.000000000 -0500
+++ remake-4.3+dbg-1.5/src/remake.c	2020-07-31 22:34:26.798330508 -0500
@@ -1665,8 +1665,10 @@
 {
   static const char *dirs[] =
     {
+#if 0
       "/lib",
       "/usr/lib",
+#endif
 #if defined(WINDOWS32) && !defined(LIBDIR)
 /*
  * This is completely up to the user at product install time. Just define
lass='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
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<div class='path'>path: <a href='/guix/log/?id=4a635d3d6ef78d989926209c5fda6f97601b2ce1'>root</a>/<a href='/guix/log/gnu?id=4a635d3d6ef78d989926209c5fda6f97601b2ce1'>gnu</a>/<a href='/guix/log/gnu/packages?id=4a635d3d6ef78d989926209c5fda6f97601b2ce1'>packages</a>/<a href='/guix/log/gnu/packages/security-token.scm?id=4a635d3d6ef78d989926209c5fda6f97601b2ce1'>security-token.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/packages/security-token.scm?id=4a635d3d6ef78d989926209c5fda6f97601b2ce1&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-05-20 04:16:05 +0200'>2019-05-20</span></td><td><a href='/guix/commit/gnu/packages/security-token.scm?id=b8ae2e9e216acd4f0eb8b786adf0da5d27aa5701'>gnu: libu2f-host: Update to 1.1.10.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/security-token.scm (libu2f-host): Update to 1.1.10.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-04-30 17:02:38 +0200'>2019-04-30</span></td><td><a href='/guix/commit/gnu/packages/security-token.scm?id=4fdad3edc39d1bbc60bdc3340da9b670697167ce'>gnu: eid-mw: Name checkout.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/security-token.scm (eid-mw)[source]:
Add FILE-NAME.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-04-24 21:08:39 -0700'>2019-04-24</span></td><td><a href='/guix/commit/gnu/packages/security-token.scm?id=4728806185a0d85155ea4db795d1643a8c849d65'>gnu: Add python-yubikey-manager and python2-yubikey-manager.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/security-token.scm (python-yubikey-manager)
(python2-yubikey-manager): New variables.
</span></span></td><td>Chris Marusich</td></tr>
<tr><td><span title='2019-04-24 21:08:39 -0700'>2019-04-24</span></td><td><a href='/guix/commit/gnu/packages/security-token.scm?id=5297e97599db5b6f1eb135ab2b7b488f83ac6b70'>gnu: Add python-fido2 and python2-fido2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/security-token.scm (python-fido2, python2-fido2): New
variables.
</span></span></td><td>Chris Marusich</td></tr>
<tr><td><span title='2019-04-24 21:08:39 -0700'>2019-04-24</span></td><td><a href='/guix/commit/gnu/packages/security-token.scm?id=5f7d151c77e486bb37819e35c0e14f10567564a3'>gnu: Add libu2f-host.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/security-token.scm (libu2f-host): New variable.
</span></span></td><td>Chris Marusich</td></tr>
<tr><td><span title='2019-04-24 21:08:38 -0700'>2019-04-24</span></td><td><a href='/guix/commit/gnu/packages/security-token.scm?id=404037f83db4b5f3b21ba05a41a6a6697ad2b5f3'>gnu: Add python-pyscard and python2-pyscard.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/security-token.scm (python-pyscard, python2-pyscard): New
variables.
</span></span></td><td>Chris Marusich</td></tr>
<tr><td><span title='2019-04-22 02:32:13 +0200'>2019-04-22</span></td><td><a href='/guix/commit/gnu/packages/security-token.scm?id=5df6934cdb1fb42cc54c6b06cfb9ab2113479ec3'>gnu: eid-mw: Update to 4.4.16.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/security-token.scm (eid-mw): Update to 4.4.16.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-04-15 06:45:07 +0200'>2019-04-15</span></td><td><a href='/guix/commit/gnu/packages/security-token.scm?id=a9203c237af40e49d8f83a6af353315169cae87b'>gnu: yubikey-personalization: Update to 1.19.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/security-token.scm (yubikey-personalization): Update to 1.19.3.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-03-31 21:26:16 +0200'>2019-03-31</span></td><td><a href='/guix/commit/gnu/packages/security-token.scm?id=ee74a0766877c2f15eb078b2bda6ba12a741b4f7'>gnu: pcsc-lite: Update to 1.8.25.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/security-token.scm (pcsc-lite): Update to 1.8.25.
</span></span></td><td>Marius Bakke</td></tr>