diff --git a/share/ruby-install/checksums.sh b/share/ruby-install/checksums.sh
index aa2a64bf..c55a78bb 100644
--- a/share/ruby-install/checksums.sh
+++ b/share/ruby-install/checksums.sh
@@ -30,7 +30,8 @@ function lookup_checksum()
 		return 1
 	fi
 
-	local output="$(grep "  $file" "$checksums")"
+	local output
+	output="$(grep "  $file" "$checksums")"
 
 	echo -n "${output%% *}"
 }
@@ -55,7 +56,8 @@ function compute_checksum()
 	fi
 
 	debug "$program $file"
-	local output="$($program "$file")"
+	local output
+	output="$($program "$file")"
 
 	echo -n "${output%% *}"
 }
@@ -71,7 +73,8 @@ function verify_checksum()
 		return
 	fi
 
-	local actual_checksum="$(compute_checksum "$algorithm" "$file")"
+	local actual_checksum
+	actual_checksum="$(compute_checksum "$algorithm" "$file")"
 
 	if [[ "$actual_checksum" != "$expected_checksum" ]]; then
 		error "Invalid $algorithm checksum for $file"
diff --git a/share/ruby-install/functions.sh b/share/ruby-install/functions.sh
index 7fad2a55..7ab15f45 100644
--- a/share/ruby-install/functions.sh
+++ b/share/ruby-install/functions.sh
@@ -19,7 +19,10 @@ function load_dependencies_from()
 {
 	local file="$1"
 
-	ruby_dependencies=($(fetch "$ruby/$file" "$package_manager" || return $?))
+	ruby_dependencies=()
+	while IFS='' read -r line; do
+		ruby_dependencies+=("$line")
+	done < <(fetch "$ruby/$file" "$package_manager" || return $?)
 }
 
 #
diff --git a/share/ruby-install/package_manager.sh b/share/ruby-install/package_manager.sh
index 083d5465..1a650192 100644
--- a/share/ruby-install/package_manager.sh
+++ b/share/ruby-install/package_manager.sh
@@ -29,7 +29,8 @@ function install_packages()
 			run $sudo pkg install -y "$@" || return $?
 			;;
 		brew)
-			local brew_owner="$(/usr/bin/stat -f %Su "$(command -v brew)")"
+			local brew_owner=
+			brew_owner="$(/usr/bin/stat -f %Su "$(command -v brew)")"
 			local brew_sudo=""
 
 			if [[ "$brew_owner" != "$(id -un)" ]]; then
@@ -40,7 +41,10 @@ function install_packages()
 			run $brew_sudo brew upgrade "$@" || return $?
 			;;
 		pacman)
-			local missing_pkgs=($(pacman -T "$@"))
+			local missing_pkgs=()
+			while IFS='' read -r line; do
+				missing_pkgs+=("$line")
+			done < <(pacman -T "$@")
 
 			if (( ${#missing_pkgs[@]} > 0 )); then
 				run $sudo pacman -S "${missing_pkgs[@]}" || return $?
diff --git a/share/ruby-install/ruby-install.sh b/share/ruby-install/ruby-install.sh
index 2d81d99d..b17c1cee 100644
--- a/share/ruby-install/ruby-install.sh
+++ b/share/ruby-install/ruby-install.sh
@@ -87,7 +87,7 @@ function parse_ruby()
 	case "$string" in
 		*-[0-9]*)
 			ruby="${string%-[0-9]*}"
-			ruby_version="${string#$ruby-}"
+			ruby_version="${string#"$ruby"-}"
 			;;
 		[0-9]*)
 			ruby="ruby"
@@ -272,7 +272,8 @@ function init()
 		return 1
 	fi
 
-	local fully_qualified_version="$(lookup_ruby_version "$ruby" "$ruby_version")"
+	local fully_qualified_version
+	fully_qualified_version="$(lookup_ruby_version "$ruby" "$ruby_version")"
 
 	if [[ -n "$fully_qualified_version" ]]; then
 		ruby_version="$fully_qualified_version"
diff --git a/share/ruby-install/util.sh b/share/ruby-install/util.sh
index 5b3dffc2..6b5b2d4f 100644
--- a/share/ruby-install/util.sh
+++ b/share/ruby-install/util.sh
@@ -12,7 +12,7 @@ function fetch()
 
 	while IFS="" read -r line; do
 		if [[ "$line" == "$key:"* ]]; then
-			echo "${line##$key:*([[:space:]])}"
+			echo "${line##"$key":*([[:space:]])}"
 		fi
 	done < "$file"
 }