RF: can't assume $FSLTCLSH is set

meta.yaml

@@ -9,7 +9,7 @@
 {% set name       = 'fsl-fdt' %}
 {% set version    = '2103.0' %}
 {% set repository = 'https://git.fmrib.ox.ac.uk/fsl/fdt.git' %}
-{% set build      = '1' %}
+{% set build      = '2' %}
 
 package:
   name:    {{ name    }}

post-link.sh

@@ -12,7 +12,7 @@ if [ -e ${FSLDIR}/share/fsl/sbin/createFSLWrapper ]; then
     rearrange xfibres_pred
 
     # Update TCL library index for files newly added to $FSLDIR/tcl
-    if [ ${FSLDIR} = ${PREFIX} ]; then
-        echo "auto_mkindex $FSLDIR/tcl/ *.tcl" | ${FSLTCLSH}
+    if [ ${FSLDIR} = ${PREFIX} ] && [ -e ${PREFIX}/bin/fsltclsh ]; then
+        echo "auto_mkindex ${FSLDIR}/tcl/ *.tcl" | ${PREFIX}/bin/fsltclsh
     fi
 fi