diff --git a/bin/build b/bin/build
index c19cbba..1f0ecac 100755
--- a/bin/build
+++ b/bin/build
@@ -136,10 +136,10 @@ if config.passthru:
     bootscript = '''
         Set Src Disk:Src:
         Export Src
-        Directory {{Src}}
+        Directory {Src}
         Set Exit 0
 
-        ''' + {config.passthru} + '''
+        ''' + config.passthru + '''
 
         # DumpObj SeriousFile.c.o to SeriousFile.c.d
         Files -r -o -f -t 'OBJ ' -c 'MPS ' Disk:Src:BuildResults | StreamEdit ∂