diff --git a/tools/scons/project.py b/tools/scons/project.py
index 3fee3d3..9a45e12 100644
--- a/tools/scons/project.py
+++ b/tools/scons/project.py
@@ -424,6 +424,10 @@ def setup_environment():
     
     # Initialize environment with basic tools
     env = Environment(tools=['gcc', 'g++', 'gnulink', 'ar', 'gas', 'as'])
+
+    # GCC uses this standard variable to make __DATE__/__TIME__ reproducible.
+    if os.environ.get('SOURCE_DATE_EPOCH'):
+        env['ENV']['SOURCE_DATE_EPOCH'] = os.environ['SOURCE_DATE_EPOCH']
     
     # Set up basic environment variables
     env['GCCPREFIX'] = ''