[feat] Disable pip caching for reproducibility

src/zc/buildout/easy_install.py

@@ -1877,6 +1877,12 @@ try:
 except ImportError:
     PIP_HAS_PYTHON_VERSION_WARNING_OPTION = False
 
+try:
+    from pip._internal.cli.cmdoptions import no_cache
+    PIP_HAS_CACHE_OPTION = True
+except ImportError:
+    PIP_HAS_CACHE_OPTION = False
+
 
 def call_pip_command(command, operand, options, verbosity=-10):
     """
@@ -1929,6 +1935,10 @@ def call_pip_command(command, operand, options, verbosity=-10):
             else:
                 args.append('--no-python-version-warning')
 
+        if PIP_HAS_CACHE_OPTION:
+            # Disable pip caching
+            args.append('--no-cache-dir')
+
         args.extend(operand)
 
         if log_level < logging.DEBUG: