Improved env cleaning

spec.py

@@ -72,11 +72,6 @@ prepared_by = spec.py script
 ## just assuming:
 hw_fpu = Integrated
 sw_state = Multi-user
-
-## cleaning environment
-env_vars = 1
-ENV_LANG=C
-ENV_DISPLAY=
 """
 
 class SigKill(Exception):
@@ -279,6 +274,6 @@ if __name__ == "__main__":
 		fh.write(conf)
 	if options.config_only:
 		exit(0)
-	cmd = "bash -c 'source shrc && runspec all -c generated'"
+	cmd = "env bash -l -c 'source shrc && runspec all -c generated'"
 	os.system(cmd)