Desktop File for Acme [plan9port]

I'm trying to set up a desktop entry so I can launch acme w/o opening a 
spare terminal.  So far I have this in the entry:
```
[Desktop Entry]
Version=1.0
Type=Application
Exec=/home/parker/bin/acme.rc &
Terminal=true
Name=Acme
Icon=/usr/local/plan9/mac/spaceglenda.png
```
And the executable file is:
```
#!/usr/bin/env rc

TERM=dumb
plumber
	
fn cd { builtin cd $1 && awd $sysname }
tabstop=4

#font='/mnt/font/Lucida Grande/15a/font'
#font='/mnt/font/Roboto Regular/14a/font'
#font='/mnt/font/Noto Sans/13a/font'

lfont=/mnt/font/UnifontMedium/10a/font
font=$lfont

SHELL=rc
exec acme -a -f $font -F $lfont $*
```
The script works when I launch it in a terminal.  But I can't figure out 
why it isn't working via the desktop entry.  I had `terminal` set to 
false before and it didn't work.  But when I set it to true, I see a 
terminal screen flicker for a moment before it vanishes again.  Anyone 
here have any luck with doing this?