diff --git a/artiq/default.nix b/artiq/default.nix
index 51a4989..6db93a8 100644
--- a/artiq/default.nix
+++ b/artiq/default.nix
@@ -23,7 +23,7 @@ let
         };
       }) {} boards;
   manualPackages = import ./pkgs/artiq-manual.nix {
-    inherit stdenv lib fetchgit python3Packages texlive texinfo;
+    inherit stdenv lib fetchgit git python3Packages texlive texinfo;
     inherit (pythonDeps) sphinxcontrib-wavedrom;
   };
   mainPackages = rec {
diff --git a/artiq/pkgs/artiq-manual.nix b/artiq/pkgs/artiq-manual.nix
index 14780e9..9cce519 100644
--- a/artiq/pkgs/artiq-manual.nix
+++ b/artiq/pkgs/artiq-manual.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchgit, python3Packages, texlive, texinfo, sphinxcontrib-wavedrom }:
+{ stdenv, lib, fetchgit, git, python3Packages, texlive, texinfo, sphinxcontrib-wavedrom }:
 
 let
   artiqVersion = import ./artiq-version.nix;
@@ -18,6 +18,7 @@ let
 
     src = import ./artiq-src.nix { inherit fetchgit; };
     buildInputs = [
+      git
       python3Packages.sphinx python3Packages.sphinx_rtd_theme
       python3Packages.sphinx-argparse sphinxcontrib-wavedrom
     ] ++
@@ -26,6 +27,7 @@ let
 
     preBuild = ''
         export VERSIONEER_OVERRIDE=${artiqVersion}
+        export SOURCE_DATE_EPOCH=`${git}/bin/git log -1 --format=%ct`
         cd doc/manual
       '';
     makeFlags = [ target ];