diff --git a/tcshrc.prompt.final b/tcshrc.prompt.final
index 2c54855..314a836 100644
--- a/tcshrc.prompt.final
+++ b/tcshrc.prompt.final
@@ -65,14 +65,25 @@ _debug "Dynamic color loading processed..."
 if( ${#reference_colors} == 0 ) then
 	_debug colorshuffle
     #echo 
+
     # Shuffle, if supported
     if( $?cshenv_detected_shuf ) then
         _debug "PRIMARY COLOR!"
-        set reference_colors=`shuf -e $reference_colors_original`
-    else
+        set reference_colors=`shuf -e ${reference_colors_original}`
+
+	# Then use `sort -R` if possible
+    else if ( $?cshenv_sort_can_shuffle ) then
         _debug "FALLBACK COLOR!"
-        set reference_colors=`echo $reference_colors_original | tr " " "\n" | sort -R | xargs`
+        set reference_colors=( `echo ${reference_colors_original} | tr " " "\n" | sort -R` )
+
+	# If not, `awk` with prepended random numbers can be used to trick
+	# `sort` into a shuffle
+	else
+        _debug "POSIX FALLBACK COLOR!"
+		set _seed=`date +%s%N`
+		set reference_colors=( `echo ${reference_colors_original} | tr " " "\n" | awk -v seed="${_seed}" 'BEGIN{srand(seed)} {print rand(), $0}' | sort -n | awk '{print $2}'` )
     endif
+
     if( $?last_color ) then
 		set first_color = ${reference_colors[1]}
 		if( ${first_color} == ${last_color} ) then
@@ -89,17 +100,30 @@ endif
 if( ${#referencechars} == 0 ) then
 	_debug symbolshuffle
     #echo 
+
+	# Then use `sort -R` if possible
     if( $?cshenv_detected_shuf ) then
         _debug "PRIMARY CHAR!"
-        set referencechars=`shuf -e $referencechars_original`
-    else
+        set referencechars=`shuf -e ${referencechars_original}`
+
+	# Then use `sort -R` if possible
+    else if ( $?cshenv_sort_can_shuffle ) then
         _debug "FALLBACK CHAR!"
         set referencechars=(`echo $referencechars_original | tr " " "\n" | sort -R | xargs`)
+
+	# If not, `awk` with prepended random numbers can be used to trick
+	# `sort` into a shuffle
+	else
+        _debug "POSIX FALLBACK CHAR!"
+		set _seed=`date +%s%N`
+		set referencechars=( `echo ${referencechars_original} | tr " " "\n" | awk -v seed="${_seed}" 'BEGIN{srand(seed)} {print rand(), $0}' | sort -n | awk '{print $2}'` )
     endif
+
     if( $?last_sym ) then
 		set first_sym = ${referencechars[1]}
 		if( ${first_sym} == ${last_sym} ) then
 			_debug "COLLISION CHAR!"
+			# Instead of a reshuffle, we put the collision at the end.
 			set tmp_char="${referencechars[1]}"
 			shift referencechars
 			set referencechars=( ${referencechars} ${tmp_char} )