From f1ec2d676df9822c3b74acf236f96011784a8642 Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Thu, 2 Jun 2022 15:00:52 -0700
Subject: gnu: complexity: Use a specific date in manpage.

* gnu/packages/code.scm (complexity)[arguments]: Add 'set-man-page-date phase.
---
 gnu/packages/code.scm | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gnu/packages/code.scm b/gnu/packages/code.scm
index 437c735c79..1093bff028 100644
--- a/gnu/packages/code.scm
+++ b/gnu/packages/code.scm
@@ -120,6 +120,13 @@ a major mode for Emacs for examining the flowcharts that it produces.")
                (base32
                 "0lr0l9kj2w3jilz9h9y4np9pf9i9ccpy6331lanki2fnz4z8ldvd"))))
     (build-system gnu-build-system)
+    (arguments
+     (list #:phases
+           #~(modify-phases %standard-phases
+               (add-before 'build 'set-man-page-date
+                 ;; Avoid embedding the current date for reproducible builds
+                 (lambda _
+                   (setenv "MAN_PAGE_DATE" "2012-04-18"))))))
     (native-inputs
      (list texinfo autogen))
     (home-page "https://www.gnu.org/software/complexity/")
-- 
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