diff -u linux-x86_64.orig/computeQuadFringeIntegrals linux-x86_64/computeQuadFringeIntegrals
--- linux-x86_64.orig/computeQuadFringeIntegrals	2022-05-11 17:16:01.000000000 +0200
+++ linux-x86_64/computeQuadFringeIntegrals	2022-05-12 16:36:53.000000000 +0200
@@ -2,8 +2,9 @@
 # \
 exec oagtclsh "$0" "$@"
 
-set auto_path [linsert $auto_path 0  /usr/local/oag/apps/lib/$env(HOST_ARCH)]
-set auto_path [linsert $auto_path 0 /usr/local/oag/lib_patch/$env(HOST_ARCH)]
+if {![info exists env(OAG_TOP_DIR)]} { set env(OAG_TOP_DIR) /usr/local }
+set auto_path [linsert $auto_path 0  $env(OAG_TOP_DIR)/oag/apps/lib/$env(HOST_ARCH)]
+
 APSStandardSetup
 
 #
diff -u linux-x86_64.orig/computeSCTuneSpread linux-x86_64/computeSCTuneSpread
--- linux-x86_64.orig/computeSCTuneSpread	2022-05-11 17:16:01.000000000 +0200
+++ linux-x86_64/computeSCTuneSpread	2022-05-12 16:39:28.000000000 +0200
@@ -2,11 +2,8 @@
 # \
 exec oagtclsh "$0" "$@"
 
-if [info exists $env(OAG_TOP_DIR)] {
-    set auto_path [linsert $auto_path 0  $env(OAG_TOP_DIR)/oag/apps/lib/$env(HOST_ARCH)]
-} else {
-    set auto_path [linsert $auto_path 0  /usr/local/oag/apps/lib/$env(HOST_ARCH)]
-}
+if {![info exists env(OAG_TOP_DIR)]} { set env(OAG_TOP_DIR) /usr/local }
+set auto_path [linsert $auto_path 0  $env(OAG_TOP_DIR)/oag/apps/lib/$env(HOST_ARCH)]
 
 APSStandardSetup
 
diff -u linux-x86_64.orig/elegant2track linux-x86_64/elegant2track
--- linux-x86_64.orig/elegant2track	2022-05-11 17:16:00.000000000 +0200
+++ linux-x86_64/elegant2track	2022-05-12 16:38:20.000000000 +0200
@@ -2,8 +2,9 @@
 # \
 exec oagtclsh "$0" "$@"
 
-set auto_path [linsert $auto_path 0  /usr/local/oag/apps/lib/$env(HOST_ARCH)]
-set auto_path [linsert $auto_path 0 /usr/local/oag/lib_patch/$env(HOST_ARCH)]
+if {![info exists env(OAG_TOP_DIR)]} { set env(OAG_TOP_DIR) /usr/local }
+set auto_path [linsert $auto_path 0  $env(OAG_TOP_DIR)/oag/apps/lib/$env(HOST_ARCH)]
+
 APSStandardSetup
 package require rpn
 
diff -u linux-x86_64.orig/spectra2sdds linux-x86_64/spectra2sdds
--- linux-x86_64.orig/spectra2sdds	2022-05-11 17:15:10.000000000 +0200
+++ linux-x86_64/spectra2sdds	2022-05-12 16:38:55.000000000 +0200
@@ -2,8 +2,9 @@
 # \
 exec oagtclsh "$0" "$@"
 
-set auto_path [linsert $auto_path 0  /usr/local/oag/apps/lib/$env(HOST_ARCH)]
-set auto_path [linsert $auto_path 0 /usr/local/oag/lib_patch/$env(HOST_ARCH)]
+if {![info exists env(OAG_TOP_DIR)]} { set env(OAG_TOP_DIR) /usr/local }
+set auto_path [linsert $auto_path 0  $env(OAG_TOP_DIR)/oag/apps/lib/$env(HOST_ARCH)]
+
 APSStandardSetup
 
 set usage {usage: spectra2sdds2 -input <filename> -output <filename>}
diff -u linux-x86_64.orig/track2mag linux-x86_64/track2mag
--- linux-x86_64.orig/track2mag	2022-05-11 17:16:00.000000000 +0200
+++ linux-x86_64/track2mag	2022-05-12 16:31:42.000000000 +0200
@@ -2,8 +2,11 @@
 # \
 exec oagtclsh "$0" "$@"
 
-set auto_path [linsert $auto_path 0  /usr/local/oag/apps/lib/$env(HOST_ARCH)]
-set auto_path [linsert $auto_path 0 /usr/local/oag/lib_patch/$env(HOST_ARCH)]
+if {![info exists env(OAG_TOP_DIR)] || [string length $env(OAG_TOP_DIR)]==0} {
+    set env(OAG_TOP_DIR) /usr/local
+}
+set auto_path [linsert $auto_path 0  $env(OAG_TOP_DIR)/oag/apps/lib/$env(HOST_ARCH)]
+
 APSStandardSetup
 
 set usage {usage: track2mag -input <filename> -output <filename> }