killall is already available, no need for extra dependency

PKGBUILD

@@ -6,7 +6,7 @@ pkgdesc="Allows for LUKS-encrypted devices to be unlocked remotely over SSH"
 arch=('any')
 url="https://github.com/suiryc/archlinux-$pkgname"
 license=('GPL3')
-depends=('dropbear' 'cryptsetup' 'mkinitcpio-nfs-utils' 'psmisc' 'iproute2')
+depends=('dropbear' 'cryptsetup' 'mkinitcpio-nfs-utils' 'iproute2')
 install=$pkgname.install
 changelog='ChangeLog'
 source=("http://julien.coloos.free.fr/archlinux/$pkgname-$pkgver.tar.xz" "$pkgname.install")

src/install/ssh-cryptsetup

@@ -70,7 +70,6 @@ build() {
     add_binary "dropbear"
     add_binary "ip"
     add_binary "/usr/lib/initcpio/ipconfig" "/sbin/ipconfig"
-    add_binary "killall"
 
     # auth-related files
     add_file "/lib/libnss_files.so"