diff --git a/kdevplatform/cmake/modules/KDevPlatformMacros.cmake b/kdevplatform/cmake/modules/KDevPlatformMacros.cmake
--- a/kdevplatform/cmake/modules/KDevPlatformMacros.cmake
+++ b/kdevplatform/cmake/modules/KDevPlatformMacros.cmake
@@ -62,6 +62,14 @@
                     -j -f ${_template} .
                 DEPENDS ${_deps}
             )
+        elseif(DEFINED ENV{SOURCE_DATE_EPOCH})
+            # We assume there is tar > 1.28 if a reproducible build is wanted.
+            add_custom_command(OUTPUT ${_template}
+                COMMAND tar ARGS -c -C ${CMAKE_CURRENT_SOURCE_DIR}/${_templateName}
+                    --exclude .kdev_ignore --exclude .svn --mode=go=rX,u+rw,a-s --sort=name
+                    --mtime="@$ENV{SOURCE_DATE_EPOCH}" --owner=0 --group=0 --numeric-owner -j -f ${_template} .
+                DEPENDS ${_deps}
+            )
         else()
             add_custom_command(OUTPUT ${_template}
                 COMMAND tar ARGS -c -C ${CMAKE_CURRENT_SOURCE_DIR}/${_templateName}