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=6d51ebf63b505cd25d3ad95017c9b6d3162db148'>root</a>/<a href='/guix/log/gnu?id=6d51ebf63b505cd25d3ad95017c9b6d3162db148'>gnu</a>/<a href='/guix/log/gnu/packages?id=6d51ebf63b505cd25d3ad95017c9b6d3162db148'>packages</a>/<a href='/guix/log/gnu/packages/uucp.scm?id=6d51ebf63b505cd25d3ad95017c9b6d3162db148'>uucp.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/uucp.scm?id=6d51ebf63b505cd25d3ad95017c9b6d3162db148&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/uucp.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='2021-08-04 11:24:31 +0530'>2021-08-04</span></td><td><a href='/guix/commit/gnu/packages/uucp.scm?id=5bf675cdaf16cca96fd26d80a099f6043fe9d7f8'>gnu: Add nncp.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/uucp.scm (nncp): New variable.
</span></span></td><td>Arun Isaac</td></tr>