diff --git a/hooks/common/gl-pre-git.hub-sample b/hooks/common/gl-pre-git.hub-sample
index 94474c2..6c02e9f 100644
--- a/hooks/common/gl-pre-git.hub-sample
+++ b/hooks/common/gl-pre-git.hub-sample
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # sample pre-git hook to print pending hub requests
 
diff --git a/hooks/common/post-receive.mirrorpush b/hooks/common/post-receive.mirrorpush
index 6914f0e..f63abd2 100755
--- a/hooks/common/post-receive.mirrorpush
+++ b/hooks/common/post-receive.mirrorpush
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # gitolite mirroring
 
diff --git a/hooks/common/update.secondary.sample b/hooks/common/update.secondary.sample
index c7d9f92..aabe7f0 100644
--- a/hooks/common/update.secondary.sample
+++ b/hooks/common/update.secondary.sample
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # driver script to run multiple update "hooklets".  Each "hooklet" performs a
 # specific (possibly site-local) check, and they *all* have to succeed for the
diff --git a/src/gl-mirror-push b/src/gl-mirror-push
index 1c6da4e..70514cb 100755
--- a/src/gl-mirror-push
+++ b/src/gl-mirror-push
@@ -9,7 +9,7 @@
 # if list of slaves not given, get it from '...slaves' config
 
 die() { echo gl-mirror-push${hn:+ on $hn}: "$@" >&2; exit 1; }
-get_rc_val() { ${0%/*}/gl-query-rc $1; }
+get_rc_val() { `dirname $0`/gl-query-rc $1; }
 
 # ----------
 
diff --git a/src/gl-setup b/src/gl-setup
index bc892ac..a18b60b 100755
--- a/src/gl-setup
+++ b/src/gl-setup
@@ -21,7 +21,7 @@ GL_PACKAGE_CONF=/tmp/share/gitolite/conf
 die() { echo "$@"; exit 1; } >&2
 
 get_rc_val() {
-    ${0%/*}/gl-query-rc $1
+    `dirname $0`/gl-query-rc $1
 }
 
 TEMPDIR=`mktemp -d -t tmp.XXXXXXXXXX`