diff --git a/SConstruct b/SConstruct
index 117528de37c3..09f96a161f87 100644
--- a/SConstruct
+++ b/SConstruct
@@ -178,16 +178,7 @@ env.SConsignFile(File("#.sconsign{0}.dblite".format(pickle.HIGHEST_PROTOCOL)).ab
 
 # Build options
 
-customs = ["custom.py"]
-
-profile = ARGUMENTS.get("profile", "")
-if profile:
-    if os.path.isfile(profile):
-        customs.append(profile)
-    elif os.path.isfile(profile + ".py"):
-        customs.append(profile + ".py")
-
-opts = Variables(customs, ARGUMENTS)
+opts = Variables(args=ARGUMENTS)
 
 # Target build options
 if env.scons_version >= (4, 3):
@@ -209,6 +200,11 @@ opts.Add(BoolVariable("debug_paths_relative", "Make file paths in debug symbols
 opts.Add(EnumVariable("lto", "Link-time optimization (production builds)", "none", ("none", "auto", "thin", "full")))
 opts.Add(BoolVariable("production", "Set defaults to build Godot for use in production", False))
 opts.Add(BoolVariable("threads", "Enable threading support", True))
+opts.Add(
+    "profile",
+    "Path to one or several comma-separated Python files with variable declarations to override default arguments",
+    "custom.py",
+)
 
 # Components
 opts.Add(BoolVariable("deprecated", "Enable compatibility code for deprecated and removed features", True))
@@ -242,7 +238,7 @@ opts.Add("vsproj_name", "Name of the Visual Studio solution", "godot")
 opts.Add("import_env_vars", "A comma-separated list of environment variables to copy from the outer environment.", "")
 opts.Add(BoolVariable("disable_3d", "Disable 3D nodes for a smaller executable", False))
 opts.Add(BoolVariable("disable_advanced_gui", "Disable advanced GUI nodes and behaviors", False))
-opts.Add("build_profile", "Path to a file containing a feature build profile", "")
+opts.Add("build_profile", "Path to a file containing a JSON feature build profile generated by Godot", "")
 opts.Add(BoolVariable("modules_enabled_by_default", "If no, disable all modules except ones explicitly enabled", True))
 opts.Add(BoolVariable("no_editor_splash", "Don't use the custom splash screen for the editor", True))
 opts.Add(
@@ -305,6 +301,25 @@ opts.Add("rcflags", "Custom flags for Windows resource compiler")
 # in following code (especially platform and custom_modules).
 opts.Update(env)
 
+# Process user profiles with custom arguments.
+custom_profiles = env["profile"].split(",")
+profiles_to_load = []
+custom_args = {}
+for profile in custom_profiles:
+    if os.path.isfile(profile):
+        profiles_to_load.append(profile)
+    elif os.path.isfile(profile + ".py"):
+        profiles_to_load.append(profile + ".py")
+if profiles_to_load:
+    for profile in profiles_to_load:
+        profile_args = {}
+        with open(profile, "r", encoding="utf-8") as f:
+            code = f.read()
+            exec(code, {}, profile_args)
+        custom_args = {**custom_args, **profile_args}
+    # Update the variables based on the profiles.
+    opts.Update(env, {**ARGUMENTS, **custom_args, **env})
+
 # Copy custom environment variables if set.
 if env["import_env_vars"]:
     for env_var in str(env["import_env_vars"]).split(","):
@@ -374,6 +389,15 @@ if env["platform"] in platform_opts:
     for opt in platform_opts[env["platform"]]:
         opts.Add(opt)
 
+# Platform-specific flags.
+# These can sometimes override default options, so they need to be processed
+# as early as possible to ensure that we're using the correct values.
+flag_list = platform_flags[env["platform"]]
+for key, value in flag_list.items():
+    # Allow command line and profiles to override platform flags.
+    if (key not in ARGUMENTS or ARGUMENTS[key] == "auto") and key not in custom_args:
+        env[key] = value
+
 # Update the environment to take platform-specific options into account.
 opts.Update(env, {**ARGUMENTS, **env.Dictionary()})
 
@@ -568,17 +592,8 @@ if env["build_profile"] != "":
         print_error('Failed to open feature build profile: "{}"'.format(env["build_profile"]))
         Exit(255)
 
-# Platform specific flags.
-# These can sometimes override default options.
-flag_list = platform_flags[env["platform"]]
-for key, value in flag_list.items():
-    if key not in ARGUMENTS or ARGUMENTS[key] == "auto":  # Allow command line to override platform flags
-        env[key] = value
-
 # 'dev_mode' and 'production' are aliases to set default options if they haven't been
 # set manually by the user.
-# These need to be checked *after* platform specific flags so that different
-# default values can be set (e.g. to keep LTO off for `production` on some platforms).
 if env["dev_mode"]:
     env["verbose"] = methods.get_cmdline_bool("verbose", True)
     env["warnings"] = ARGUMENTS.get("warnings", "extra")
diff --git a/platform/android/detect.py b/platform/android/detect.py
index ed0ceb5862c0..0b182aca90ef 100644
--- a/platform/android/detect.py
+++ b/platform/android/detect.py
@@ -68,7 +68,7 @@ def get_min_target_api():
 
 def get_flags():
     return {
-        "arch": "arm64",  # Default for convenience.
+        "arch": "arm64",
         "target": "template_debug",
         "supported": ["mono"],
     }
diff --git a/platform/ios/detect.py b/platform/ios/detect.py
index 35e1b9cd6d08..53b367a0a7f2 100644
--- a/platform/ios/detect.py
+++ b/platform/ios/detect.py
@@ -48,7 +48,7 @@ def get_doc_path():
 
 def get_flags():
     return {
-        "arch": "arm64",  # Default for convenience.
+        "arch": "arm64",
         "target": "template_debug",
         "use_volk": False,
         "supported": ["mono"],