AWK not working FOR LOOP

This works:
int=$(file "$flac"|awk -F ": FLAC" '{print $1}')
echo "$int"

This works:
find . -type f -name "*.flac" -exec sh -c '
for flac do
int=$(file "$flac"|grep 44.1)
echo "$int"
done
' exec-sh {} +

I cannot understand why this does not work:
find . -type f -name "*.flac" -exec sh -c '
for flac do
int=$(file "$flac"|awk -F ": FLAC" '{print $1}')
echo "$int"
done
' exec-sh {} +

The error are:
: 3: Syntax error: end of file unexpected (expecting ")")
})
echo "$int"
done
: 3: Syntax error: end of file unexpected (expecting ")")
})
echo "$int"
done
: 3: Syntax error: end of file unexpected (expecting ")")
})
echo "$int"
done
: 3: Syntax error: end of file unexpected (expecting ")")

I am hand typing the commands in.

Any help is greatly appreciated!