Do not capture the build-time value of $PATH in the 'emacs' executable
since this can noticeably increase the size of the closure of Emacs
with things like GCC being referenced.

--- a/lisp/loadup.el
+++ b/lisp/loadup.el
@@ -64,6 +64,11 @@
 			    (expand-file-name "textmodes" dir)
 			    (expand-file-name "vc" dir)))))
 
+;; Reset 'exec-path' so we don't capture the build-time $PATH in the
+;; 'emacs' executable.
+(setq-default exec-path nil)
+(setq exec-path nil)
+
 (if (eq t purify-flag)
     ;; Hash consing saved around 11% of pure space in my tests.
     (setq purify-flag (make-hash-table :test 'equal :size 70000)))
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<div class='path'>path: <a href='/guix/log/?id=103d8229cbbd3baefe1f3b02bc2edff9c816b0bf'>root</a>/<a href='/guix/log/gnu?id=103d8229cbbd3baefe1f3b02bc2edff9c816b0bf'>gnu</a>/<a href='/guix/log/gnu/packages?id=103d8229cbbd3baefe1f3b02bc2edff9c816b0bf'>packages</a>/<a href='/guix/log/gnu/packages/flex.scm?id=103d8229cbbd3baefe1f3b02bc2edff9c816b0bf'>flex.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/flex.scm?id=103d8229cbbd3baefe1f3b02bc2edff9c816b0bf&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/flex.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>This commit was obtained by running:

  ./pre-inst-env guix style

without any additional argument.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-03-21 20:17:20 +0100'>2020-03-21</span></td><td><a href='/guix/commit/gnu/packages/flex.scm?id=ee38d87c58aaf8f8c1b7599a598a56b94f09f711'>gnu: Remove flex@2.6.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/flex.scm (flex-2.6.1): Remove variable.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-07-09 21:07:13 +0200'>2019-07-09</span></td><td><a href='/guix/commit/gnu/packages/flex.scm?id=33f460addfcc737a7a80dab244211811283b77f7'>gnu: flex: Remove superfluous input.</a><span class='msg-avail'>...<span class='msg-tooltip'>The configure script will warn that "make indent" is unavailable, but
apart from that this input is not actually used for the build process.

* gnu/packages/flex.scm (flex)[inputs]: Remove INDENT.
* gnu/packages/commencement.scm (flex-boot0)[inputs]: Likewise.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-06-29 22:34:20 +0200'>2019-06-29</span></td><td><a href='/guix/commit/gnu/packages/flex.scm?id=06172df545f1253463bc51a9e2c39bf2133f3f23'>gnu: flex: Build bison-for-tests sequentially.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to b1593c1c4fd8f4fc6df4c43cab51334426e3aa76.

* gnu/packages/flex.scm (flex)[inputs](bison-for-tests): Use
'substitute-keyword-arguments' instead of overriding them altogether.
This ensures that #:parallel-build? and #:parallel-tests? are
preserved.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-08-25 16:23:36 +0200'>2018-08-25</span></td><td><a href='/guix/commit/gnu/packages/flex.scm?id=34f4c214b63c46ee609bbaa15b063e20bc739ce3'>gnu: flex: Update bison-for-tests to 3.0.5.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/flex.scm (flex)[inputs]: Make BISON-FOR-TESTS inherit source
from BISON, and disable tests on it since they require flex.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-05-23 13:59:46 +0200'>2018-05-23</span></td><td><a href='/guix/commit/gnu/packages/flex.scm?id=8efe2a22eaaf00d667c54968c025a3477cb3c3f7'>gnu: Use "code" instead of "indent".</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a follow-up to commit e470abf8b789e61ae918a80f141e3c06afd44832.

* gnu/packages/commencement.scm,
gnu/packages/flex.scm: Use module "code" instead of "indent".
</span></span></td><td>Ricardo Wurmus</td></tr>