diff --git a/src/python/jw/pkg/cmds/projects/CmdBuild.py b/src/python/jw/pkg/cmds/projects/CmdBuild.py
index c6424ecf..048b4655 100644
--- a/src/python/jw/pkg/cmds/projects/CmdBuild.py
+++ b/src/python/jw/pkg/cmds/projects/CmdBuild.py
@@ -4,7 +4,7 @@ import os, re, sys, subprocess, datetime, time
 from argparse import Namespace, ArgumentParser
 from functools import lru_cache
 
-from ...lib.util import run_cmd
+from ...lib.util import run_cmd, get_profile_env
 from ...lib.log import *
 from ..Cmd import Cmd
 from ..CmdProjects import CmdProjects
@@ -24,6 +24,8 @@ class CmdBuild(Cmd): # export
             default=False, help='Don\'t build anything, just print the build order.')
         parser.add_argument('-I', '--ignore-deps', action='store_true',
             default=False, help='Don\'t build dependencies, i.e. build only modules specified on the command line')
+        parser.add_argument('--source-profile', choices=['no', 'add', 'replace'],
+            default='no', help='Source /etc/profile before each build step')
         parser.add_argument('target', default='all', help='Build target')
         parser.add_argument('modules', nargs='+', default='', help='Modules to be built')
 
@@ -85,16 +87,21 @@ class CmdBuild(Cmd): # export
             return 1
 
         async def run_make(module, target, cur_project, num_projects):
+
+            patt = self.app.is_excluded_from_build(module)
+            if patt is not None:
+                print(f',{title} >')
+                print(f'| Configured to skip build on platform >{patt}<')
+                print(f'`{title} <')
+                return
+
             make_cmd = [ "make", target ]
             wd = self.app.find_dir(module, pretty=False)
             title = '---- [%d/%d]: Running "%s" in %s -' % (cur_project, num_projects, ' '.join(make_cmd), wd)
 
-            patt = self.app.is_excluded_from_build(module)
-            if patt is not None:
-                print(',' + title + ' >')
-                print('| Configured to skip build on platform >' + patt + '<')
-                print('`' + title + ' <')
-                return
+            env = None
+            if args.source_profile != 'no':
+                env = await get_profile_env(add=True if args.source_profile == 'add' else False)
 
             try:
                 stdout, stderr = await run_cmd(
@@ -103,7 +110,7 @@ class CmdBuild(Cmd): # export
                     throw=True,
                     verbose=True,
                     cmd_input=None,
-                    env=None,
+                    env=env,
                     title=title
                 )
             except Exception as e: