diff --git a/provision.py b/provision.py
index fa52359..e815758 100644
--- a/provision.py
+++ b/provision.py
@@ -58,6 +58,11 @@ def source_files() -> list[Path]:
     return files
 
 
+def chmod_lines(target: str, spec: str, indent: str = "") -> list[str]:
+    # Grey Hack File.chmod accepts one class per call, e.g. "u+rwx", not "u+rwx,g+rx".
+    return [f'{indent}{target}.chmod("{part}")' for part in spec.split(",")]
+
+
 def install_binary_lines(var: str, bin_name: str) -> list[str]:
     return install_file_lines(var, f"/bin/{bin_name}", bin_name)
 
@@ -68,7 +73,7 @@ def install_file_lines(var: str, path: str, name: str) -> list[str]:
         f'if not {var}_bin then exit("Failed to install {name}")',
         f'{var}_bin.set_group("root")',
         f'{var}_bin.set_owner("root")',
-        f'{var}_bin.chmod("u+rwx,g+rx,o+rx")',
+        *chmod_lines(f"{var}_bin", "u+rwx,g+rx,o+rx"),
         "",
     ]
 
@@ -87,7 +92,7 @@ def downloaded_program_lines(name: str, destination: str) -> list[str]:
         f'\telse',
         f'\t\t{var}_bin.set_group("root")',
         f'\t\t{var}_bin.set_owner("root")',
-        f'\t\t{var}_bin.chmod("u+rwx,g+rx,o+rx")',
+        *chmod_lines(f"{var}_bin", "u+rwx,g+rx,o+rx", indent="\t\t"),
         f'\tend if',
         f'end if',
         "",
@@ -105,9 +110,9 @@ def metaxploit_lines() -> list[str]:
         "\tif not metaxploit_guest then",
         '\t\tprint("Failed to copy metaxploit.so to guest")',
         "\telse",
+        *chmod_lines("metaxploit_guest", "u+rwx,g+rx,o+rx", indent="\t\t"),
         '\t\tmetaxploit_guest.set_group("guest")',
         '\t\tmetaxploit_guest.set_owner("guest")',
-        '\t\tmetaxploit_guest.chmod("u+rwx,g+rx,o+rx")',
         "\tend if",
         '\tmetaxploit_lib.move("/lib", "metaxploit.so")',
         '\tmetaxploit_lib = cp.File("/lib/metaxploit.so")',
@@ -116,7 +121,7 @@ def metaxploit_lines() -> list[str]:
         "\telse",
         '\t\tmetaxploit_lib.set_group("root")',
         '\t\tmetaxploit_lib.set_owner("root")',
-        '\t\tmetaxploit_lib.chmod("u+rw,g+rw,o+rw")',
+        *chmod_lines("metaxploit_lib", "u+rw,g+rw,o+rw", indent="\t\t"),
         "\tend if",
         "end if",
         "",
diff --git a/source/bbuild.src b/source/bbuild.src
index ffca4f4..0189582 100644
--- a/source/bbuild.src
+++ b/source/bbuild.src
@@ -31,6 +31,8 @@ else
 	guest_file = cp.File(current_path + "/" + bin_name)
 end if
 guest_file.move "/home/" + active_user + "/guest/", bin_name
-guest_file.chmod "u+rwx,g+rwx,o+rwx"
+guest_file.chmod "u+rwx"
+guest_file.chmod "g+rwx"
+guest_file.chmod "o+rwx"
 guest_file.set_group "guest"
 guest_file.set_owner "guest"