diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index 46e5d3a5d0..83f0a1810b 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -1724,7 +1724,18 @@ (define-public itpp
         (base32
          "14ddy2xnb6sgp4hiax9v5sv4pr4l4dd4ps76nfha3nrpr1ikhcqm"))))
     (build-system cmake-build-system)
-    (arguments `(#:tests? #f)) ; Tests require googletest *sources*
+    (arguments `(#:tests? #f ; Tests require googletest *sources*
+                 #:phases
+                 (modify-phases %standard-phases
+                   (add-after 'unpack 'set-man-page-date
+                     (lambda _
+                       (substitute* "itpp-config.1.cmake.in"
+                         ((".PACKAGE_DATE.") "2012-04-18"))))
+                   (add-before 'build 'set-force-source-date
+                     ;; for reproducible dates, texlive needs this to respect respect
+                     ;; SOURCE_DATE_EPOCH
+                     (lambda _
+                       (setenv "FORCE_SOURCE_DATE" "1"))))))
     (inputs (list lapack fftw))
     ;; FIXME: Even though the fonts are available dvips complains:
     ;; "Font cmmi10 not found; characters will be left blank."