diff --git a/Sources/Scipio/main.swift b/Sources/Scipio/main.swift
index c320083..0a9f006 100644
--- a/Sources/Scipio/main.swift
+++ b/Sources/Scipio/main.swift
@@ -10,7 +10,7 @@ extension Command {
       .init(
         commandName: "Scipio",
         abstract: "A program to pre-build and cache Swift packages",
-        version: "0.1.11",
+        version: "0.1.12",
         subcommands: [
             Command.Build.self,
             Command.Upload.self,
diff --git a/Sources/ScipioKit/Dependency Processors/CocoaPodProcessor.swift b/Sources/ScipioKit/Dependency Processors/CocoaPodProcessor.swift
index c3ab816..3406d11 100644
--- a/Sources/ScipioKit/Dependency Processors/CocoaPodProcessor.swift	
+++ b/Sources/ScipioKit/Dependency Processors/CocoaPodProcessor.swift	
@@ -120,26 +120,24 @@ project '\(projectPath.string)'
     }
 
     private func installPods(in path: Path) throws -> [CocoaPodDescriptor] {
-        do {
-            try sh("which", "pod")
-                .waitUntilExit()
-        } catch {
+        let ruby = try Ruby()
+        var podCommandPath = try? which("pod")
+
+        if podCommandPath == nil {
             log.info("🍫  Installing CocoaPods...")
 
-            try sh("gem", "install", "cocoapods", asAdministrator: true)
-                .logOutput()
-                .waitUntilExit()
+            try ruby.installGem("cocoapods")
+
+            podCommandPath = try which("pod")
         }
 
         log.info("🍫  Installing Pods...")
 
         let sandboxPath = path + "Pods"
         let manifestPath = path + "Pods/Manifest.lock"
-        let podBinaryPath = try sh("which", "pod")
-            .waitForOutputString()
 
         try path.chdir {
-            try sh(podBinaryPath, "install")
+            try sh(podCommandPath!, "install")
                 .logOutput()
                 .waitUntilExit()
         }
diff --git a/Sources/ScipioKit/Helpers/Ruby.swift b/Sources/ScipioKit/Helpers/Ruby.swift
new file mode 100644
index 0000000..4362b90
--- /dev/null
+++ b/Sources/ScipioKit/Helpers/Ruby.swift
@@ -0,0 +1,38 @@
+import Foundation
+import PathKit
+
+public enum RubyError: LocalizedError {
+    case missingRuby
+
+    public var errorDescription: String? {
+        switch self {
+        case .missingRuby:
+            return "A Ruby installation that is not provided by the system is required to use CocoaPods dependencies. Please install Ruby via rbenv, rvm, or Homebrew."
+        }
+    }
+}
+
+struct Ruby {
+
+    private let rubyPath: Path
+    private let gemPath: Path
+
+    init() throws {
+        do {
+            rubyPath = try which("ruby")
+            gemPath = try which("gem")
+        } catch ShellError.commandNotFound {
+            throw RubyError.missingRuby
+        }
+    }
+
+    func installGem(_ gem: String) throws {
+        try sh(gemPath, "install", gem)
+            .logOutput()
+            .waitUntilExit()
+    }
+
+    func commandExists(_ command: String) -> Bool {
+        return (try? which(command)) != nil
+    }
+}
diff --git a/Sources/ScipioKit/Helpers/ShellCommand.swift b/Sources/ScipioKit/Helpers/ShellCommand.swift
index 2374506..a27095b 100644
--- a/Sources/ScipioKit/Helpers/ShellCommand.swift
+++ b/Sources/ScipioKit/Helpers/ShellCommand.swift
@@ -1,19 +1,46 @@
 import Foundation
 import PathKit
 
-func sh(_ command: String, _ arguments: String..., asAdministrator: Bool = false) -> ShellCommand {
-    ShellCommand.sh(command: command, arguments: arguments, asAdministrator: asAdministrator)
+func sh(_ command: Path, _ arguments: String..., asAdministrator: Bool = false, passEnvironment: Bool = false) -> ShellCommand {
+    ShellCommand.sh(command: command.string, arguments: arguments, asAdministrator: asAdministrator, passEnvironment: passEnvironment)
 }
 
-func sh(_ command: String, _ arguments: [String], asAdministrator: Bool = false) -> ShellCommand {
-    ShellCommand.sh(command: command, arguments: arguments, asAdministrator: asAdministrator)
+func sh(_ command: String, _ arguments: String..., asAdministrator: Bool = false, passEnvironment: Bool = false) -> ShellCommand {
+    ShellCommand.sh(command: command, arguments: arguments, asAdministrator: asAdministrator, passEnvironment: passEnvironment)
+}
+
+func sh(_ command: String, _ arguments: [String], asAdministrator: Bool = false, passEnvironment: Bool = false) -> ShellCommand {
+    ShellCommand.sh(command: command, arguments: arguments, asAdministrator: asAdministrator, passEnvironment: passEnvironment)
+}
+
+func which(_ command: String) throws -> Path {
+    do {
+        let output = try sh("/usr/bin/which", command, passEnvironment: true)
+            .waitForOutputString()
+            .trimmingCharacters(in: .whitespacesAndNewlines)
+
+        return Path(output)
+    } catch {
+        throw ShellError.commandNotFound(command)
+    }
+}
+
+public enum ShellError: LocalizedError {
+    case commandNotFound(String)
+
+    public var errorDescription: String? {
+        switch self {
+        case .commandNotFound(let command):
+            return "Command '\(command)' could not be found."
+        }
+    }
 }
 
 struct ShellCommand {
 
-    static func sh(command: String, arguments: [String], asAdministrator: Bool = false) -> ShellCommand {
+    static func sh(command: String, arguments: [String], asAdministrator: Bool = false, passEnvironment: Bool = false) -> ShellCommand {
         let shell = ShellCommand(command: command, arguments: arguments)
-        shell.run(asAdministrator: asAdministrator)
+        shell.run(asAdministrator: asAdministrator, passEnvironment: passEnvironment)
         return shell
     }
 
@@ -26,11 +53,15 @@ struct ShellCommand {
 
     private let task = Process()
 
-    func run(asAdministrator: Bool = false) {
+    func run(asAdministrator: Bool = false, passEnvironment: Bool = false) {
         task.standardOutput = outputPipe
         task.standardError = errorPipe
-        if asAdministrator {
 
+        if passEnvironment {
+            task.environment = ProcessInfo.processInfo.environment
+        }
+
+        if asAdministrator {
             let launch: () -> Void = {
                 task.arguments = ["-S"] + [command] + arguments
                 task.launchPath = "/usr/bin/sudo"
@@ -68,14 +99,17 @@ struct ShellCommand {
         }
     }
 
-    func waitForOutput() throws -> Data {
+    func waitForOutput(stdout: Bool = true, stderr: Bool = false) throws -> Data {
         try waitUntilExit()
 
-        return outputPipe.fileHandleForReading.readDataToEndOfFile()
+        let out = stdout ? outputPipe.fileHandleForReading.readDataToEndOfFile() : Data()
+        let err = stderr ? errorPipe.fileHandleForReading.readDataToEndOfFile() : Data()
+
+        return out + err
     }
 
-    func waitForOutputString() throws -> String {
-        return String(data: try waitForOutput(), encoding: .utf8) ?? ""
+    func waitForOutputString(stdout: Bool = true, stderr: Bool = false) throws -> String {
+        return String(data: try waitForOutput(stdout: stdout, stderr: stderr), encoding: .utf8) ?? ""
     }
 
     @discardableResult
diff --git a/Sources/ScipioKit/Models/Config.swift b/Sources/ScipioKit/Models/Config.swift
index e2bcd48..b028460 100644
--- a/Sources/ScipioKit/Models/Config.swift
+++ b/Sources/ScipioKit/Models/Config.swift
@@ -22,7 +22,7 @@ public struct Config: Decodable, Equatable {
         if let buildDirectory = buildDirectory {
             return Path(buildDirectory)
         } else {
-            return Path.current + ".scipio"
+            return directory + ".scipio"
         }
     }