diff --git a/contrib/kiss-chbuild b/contrib/kiss-chbuild
index 4b772b7..a4cd07e 100755
--- a/contrib/kiss-chbuild
+++ b/contrib/kiss-chbuild
@@ -12,7 +12,7 @@ clean() {
 }
 
 pid=$$
-url=https://github.com/kisslinux/repo/releases/download/1.9.0/
+url=https://github.com/kisslinux/repo/releases/download/1.9.11/
 
 cd "${cac_dir:=$KISS_ROOT${XDG_CACHE_HOME:-$HOME/.cache}/kiss}"
 
@@ -23,7 +23,7 @@ cd "${cac_dir:=$KISS_ROOT${XDG_CACHE_HOME:-$HOME/.cache}/kiss}"
 
 [ -d kiss-chroot ] || {
     log "Extracting chroot"
-    tar xvf kiss-chroot.tar.xz
+    tar xf kiss-chroot.tar.xz
 }
 
 log "Creating temporary chroot"
diff --git a/contrib/kiss-depends b/contrib/kiss-depends
index be23624..e989844 100755
--- a/contrib/kiss-depends
+++ b/contrib/kiss-depends
@@ -1,8 +1,11 @@
 #!/bin/sh -ef
 # Display a package's dependencies.
 
-kiss l "${1:-null}" >/dev/null
+# Ignore shellcheck as we want the warning's behavior.
+# shellcheck disable=2015
+[ "$1" ] && kiss l "${1:-null}" >/dev/null || {
+    printf 'usage: kiss-depends [pkg]\n'
+    exit 1
+}
 
-db_dir=$KISS_ROOT/var/db/kiss/installed/${1:-null}
-
-cat "$db_dir/depends" 2>/dev/null
+cat "$KISS_ROOT/var/db/kiss/installed/$1/depends" 2>/dev/null
diff --git a/contrib/kiss-depends-finder b/contrib/kiss-depends-finder
index 3c36494..1fe90ce 100755
--- a/contrib/kiss-depends-finder
+++ b/contrib/kiss-depends-finder
@@ -1,7 +1,12 @@
 #!/bin/sh -e
 # Find missing dependencies by parsing 'ldd'.
 
-kiss l "${1:-null}" >/dev/null
+# Ignore shellcheck as we want the warning's behavior.
+# shellcheck disable=2015
+[ "$1" ] && kiss l "${1:-null}" >/dev/null || {
+    printf 'usage: kiss-depends-finder [pkg]\n'
+    exit 1
+}
 
 db_dir=$KISS_ROOT/var/db/kiss/installed
 grep=$(command -v ggrep) || grep='grep'
@@ -29,7 +34,7 @@ while read -r file; do
 
         # Skip listing these packages as dependencies.
         case $pkg in
-            musl|gcc|$1) ;;
+            musl|gcc|"$1") ;;
             *) printf '%s\n' "$pkg" ;;
         esac
     done
diff --git a/contrib/kiss-export b/contrib/kiss-export
index 3d9f3f4..774e5c6 100755
--- a/contrib/kiss-export
+++ b/contrib/kiss-export
@@ -1,11 +1,15 @@
 #!/bin/sh -ef
 # Turn an installed package into a KISS tarball.
 
-kiss l "${1:-null}" >/dev/null
+# Ignore shellcheck as we want the warning's behavior.
+# shellcheck disable=2015
+[ "$1" ] && kiss l "${1:-null}" >/dev/null || {
+    printf 'usage: kiss-export [pkg]\n'
+    exit 1
+}
 
 # Grab the package's version..
-read -r ver rel 2>/dev/null < \
-    "$KISS_ROOT/var/db/kiss/installed/$1/version"
+read -r ver rel 2>/dev/null < "$KISS_ROOT/var/db/kiss/installed/$1/version"
 
 # Reset the argument list.
 pkg=$1
diff --git a/contrib/kiss-fork b/contrib/kiss-fork
index 6e5acdb..073fbaf 100755
--- a/contrib/kiss-fork
+++ b/contrib/kiss-fork
@@ -1,8 +1,10 @@
 #!/bin/sh -ef
 # Copy a package's repository files into the current directory.
 
-kiss s "${1:-null}" >/dev/null || {
-    printf 'usage: kiss-fork pkg_name\n'
+# Ignore shellcheck as we want the warning's behavior.
+# shellcheck disable=2015
+[ "$1" ] && kiss s "${1:-null}" >/dev/null || {
+    printf 'usage: kiss-fork [pkg]\n'
     exit 1
 }
 
diff --git a/contrib/kiss-maintainer b/contrib/kiss-maintainer
index c5ece32..478d046 100755
--- a/contrib/kiss-maintainer
+++ b/contrib/kiss-maintainer
@@ -1,6 +1,11 @@
 #!/bin/sh -ef
 # Find the maintainer of a package.
 
+[ "$1" ] || {
+    printf 'usage: kiss-maintainer [pkg]\n'
+    exit 1
+}
+
 kiss s "$1" | while read -r repo; do cd "$repo"
     m=$(git log -1 version 2>/dev/null) ||:
     m=${m##*Author: }
diff --git a/contrib/kiss-manifest b/contrib/kiss-manifest
index e7d9fe2..a7dab14 100755
--- a/contrib/kiss-manifest
+++ b/contrib/kiss-manifest
@@ -1,8 +1,11 @@
 #!/bin/sh -ef
 # Display all files owned by a package.
 
-kiss l "${1:-null}" >/dev/null
+# Ignore shellcheck as we want the warning's behavior.
+# shellcheck disable=2015
+[ "$1" ] && kiss l "${1:-null}" >/dev/null || {
+    printf 'usage: kiss-manifest [pkg]\n'
+    exit 1
+}
 
-db_dir=$KISS_ROOT/var/db/kiss/installed/${1:-null}
-
-cat "$db_dir/manifest" 2>/dev/null
+cat "$KISS_ROOT/var/db/kiss/installed/$1/manifest" 2>/dev/null
diff --git a/contrib/kiss-manifest-tree b/contrib/kiss-manifest-tree
index f5f938e..54a3c62 100755
--- a/contrib/kiss-manifest-tree
+++ b/contrib/kiss-manifest-tree
@@ -1,9 +1,12 @@
 #!/bin/sh -ef
 # Display all files owned by a package in a tree.
 
-kiss l "${1:-null}"
-
-db_dir=$KISS_ROOT/var/db/kiss/installed/${1:-null}
+# Ignore shellcheck as we want the warning's behavior.
+# shellcheck disable=2015
+[ "$1" ] && kiss l "${1:-null}" >/dev/null || {
+    printf 'usage: kiss-manifest-tree [pkg]\n'
+    exit 1
+}
 
 printf '%s\n' "[$1]:"
-tree -C --fromfile "$db_dir/manifest" | tail -n +2
+tree -C --fromfile "$KISS_ROOT/var/db/kiss/installed/$1/manifest" | tail -n +2
diff --git a/contrib/kiss-owns b/contrib/kiss-owns
index b300e55..4746ba3 100755
--- a/contrib/kiss-owns
+++ b/contrib/kiss-owns
@@ -5,9 +5,8 @@
 # follow symlinks.
 file=$(readlink -f "$KISS_ROOT/${1##$KISS_ROOT}")
 
-# Check if the file exists and exit if it is not.
 [ -f "$file" ] || {
-    printf '%s\n' "error: file '$1' doesn't exist." >&2
+    printf 'usage: kiss-owns [/path/to/file]\n'
     exit 1
 }
 
diff --git a/contrib/kiss-repodepends b/contrib/kiss-repodepends
index 2ef0bec..49617fb 100755
--- a/contrib/kiss-repodepends
+++ b/contrib/kiss-repodepends
@@ -1,4 +1,11 @@
 #!/bin/sh
 # Display a package's original dependencies.
 
+# Ignore shellcheck as we want the warning's behavior.
+# shellcheck disable=2015
+[ "$1" ] && kiss s "${1:-null}" >/dev/null || {
+    printf 'usage: kiss-repodepends [pkg]\n'
+    exit 1
+}
+
 cat "$(kiss s "$1")/depends" 2>/dev/null
diff --git a/contrib/kiss-revdepends b/contrib/kiss-revdepends
index d71026d..e8a19d7 100755
--- a/contrib/kiss-revdepends
+++ b/contrib/kiss-revdepends
@@ -1,6 +1,13 @@
 #!/bin/sh -e
 # Display packages which depend on package.
 
+# Ignore shellcheck as we want the warning's behavior.
+# shellcheck disable=2015
+[ "$1" ] && kiss l "${1:-null}" >/dev/null || {
+    printf 'usage: kiss-revdepends [pkg]\n'
+    exit 1
+}
+
 # 'cd' to the database directory as a simple way of
 # stripping the path and performing a 'basename'.
 cd "$KISS_ROOT/var/db/kiss/installed"
diff --git a/contrib/kiss-size b/contrib/kiss-size
index 367c26d..d569a8a 100755
--- a/contrib/kiss-size
+++ b/contrib/kiss-size
@@ -1,17 +1,16 @@
 #!/bin/sh -ef
 # Show the size on disk for a package.
 
-db_dir=$KISS_ROOT/var/db/kiss/installed/${1-null}
-
-# Check if package is installed and exit if it is not.
-[ -d "$db_dir" ] || {
-    printf '%s\n' "error: '$1' not installed." >&2
+# Ignore shellcheck as we want the warning's behavior.
+# shellcheck disable=2015
+[ "$1" ] && kiss l "${1:-null}" >/dev/null || {
+    printf 'usage: kiss-size [pkg]\n'
     exit 1
 }
 
 # Filter directories from manifest and leave only files.
 # Directories in the manifest end in a trailing '/'.
-files=$(sed 's|.*/$||' "$db_dir/manifest")
+files=$(sed 's|.*/$||' "$KISS_ROOT/var/db/kiss/installed/$1/manifest")
 
 # Send the file list to 'du'.
 # This unquoted variable is safe as word splitting is intended
diff --git a/kiss b/kiss
index 56c6fb7..b710812 100755
--- a/kiss
+++ b/kiss
@@ -115,7 +115,7 @@ pkg_find() {
     # Figure out which repository a package belongs to by
     # searching for directories matching the package name
     # in $KISS_PATH/*.
-    query=$1 IFS=:; set --
+    query=$1 all=$2 IFS=:; set --
 
     # Both counts of word-splitting are intentional here.
     # Firstly to split the repositories and secondly to
@@ -137,7 +137,7 @@ pkg_find() {
 
     # Show all search results if called from 'kiss search', else
     # print only the first match.
-    [ -t 1 ] || [ "$2" ] && printf '%s\n' "$@" || printf '%s\n' "$1"
+    [ -t 1 ] || [ "$all" ] && printf '%s\n' "$@" || printf '%s\n' "$1"
 }
 
 pkg_list() {