diff --git a/library/auto.tcl b/library/auto.tcl
index 02edcc4..cd3b587 100644
--- a/library/auto.tcl
+++ b/library/auto.tcl
@@ -81,6 +81,13 @@ proc tcl_findLibrary {basename version patch initScript enVarName varName} {
 	    lappend dirs [::${basename}::pkgconfig get scriptdir,runtime]
 	}
 
+	# 2a. As a sibling of Tcl's script directory
+	if {[catch {
+	    ::tcl::pkgconfig get scriptdir,runtime
+	} value] == 0} {
+	    lappend dirs [file join [file dirname $value] $basename$version]
+	}
+
 	# 3. Relative to auto_path directories.  This checks relative to the
 	# Tcl library as well as allowing loading of libraries added to the
 	# auto_path that is not relative to the core library or binary paths.
diff --git a/library/init.tcl b/library/init.tcl
index f1f7704..03ede56 100644
--- a/library/init.tcl
+++ b/library/init.tcl
@@ -47,16 +47,11 @@ if {![info exists auto_path]} {
 }
 namespace eval tcl {
     variable Dir
-    foreach Dir [list $::tcl_library [file dirname $::tcl_library]] {
+    foreach Dir [list $::tcl_library] {
 	if {$Dir ni $::auto_path} {
 	    lappend ::auto_path $Dir
 	}
     }
-    set Dir [file join [file dirname [file dirname \
-	    [info nameofexecutable]]] lib]
-    if {$Dir ni $::auto_path} {
-	lappend ::auto_path $Dir
-    }
     catch {
 	foreach Dir $::tcl_pkgPath {
 	    if {$Dir ni $::auto_path} {
diff --git a/unix/configure.in b/unix/configure.in
index e44d554..c017eaa 100755
--- a/unix/configure.in
+++ b/unix/configure.in
@@ -886,9 +886,9 @@ if test "$FRAMEWORK_BUILD" = "1" ; then
     test -z "$TCL_MODULE_PATH"  && \
 	TCL_MODULE_PATH="~/Library/Tcl /Library/Tcl /System/Library/Tcl"
 elif test "$prefix/lib" != "$libdir"; then
-    TCL_PACKAGE_PATH="${libdir} ${prefix}/lib ${TCL_PACKAGE_PATH}"
+    TCL_PACKAGE_PATH="${libdir}/tcl8.6 ${prefix}/share/tcl8.6 ${libdir}/tk8.6 ${prefix}/share/tk8.6 ${TCL_PACKAGE_PATH}"
 else
-    TCL_PACKAGE_PATH="${prefix}/lib ${TCL_PACKAGE_PATH}"
+    TCL_PACKAGE_PATH="${libdir}/tcl8.6 ${prefix}/share/tcl8.6 ${libdir}/tk8.6 ${prefix}/share/tk8.6 ${TCL_PACKAGE_PATH}"
 fi
 
 #--------------------------------------------------------------------
