diff --git a/dotfiles-old/bin/data b/dotfiles-old/bin/data
index 7fcf850..1e59282 100755
--- a/dotfiles-old/bin/data
+++ b/dotfiles-old/bin/data
@@ -2,6 +2,9 @@
 
 set -e
 
+# depends on https://git.sr.ht/~trinity/utilities (particularly fdivide(1),
+# gt(1), and stris(1)) unless POSIXLY_CORRECT is set (not tested)
+
 # these files (separated by newlines) will have the current CPU temperature
 # multiplied by $CPU_TEMP_SCALE. this script divides the file contents by scale
 # and displays that temperature (assumed to be in Celsius units)
@@ -16,10 +19,10 @@ alias date="date '+%Y-%m-%dT%T'"
 # not an integer)
 INTERVAL=1
 
-# enable if you have issues with missing `stris` etc. enabled by default.
-# will save negligible time with shells that don't spawn new processes for
-# test(1)
-POSIXLY_CORRECT=1
+# enable if you have issues with missing `stris` etc. will save negligible time
+# with shells that don't spawn new processes for test(1)
+# fdivide_posix() may not be fully working yet, so it's not enabled by default
+#POSIXLY_CORRECT=1
 
 # this URL will have in plain text the public IP address from which it was
 # accessed