diff --git a/.travis.yml b/.travis.yml
index 855a72a..abe1237 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,10 +6,13 @@ d:
   - dmd-2.070.2
   - dmd-2.069.2
   - dmd-2.068.2
-  - dmd-2.068.0
+  - dmd-2.067.2
+  - dmd-2.066.2
+  - dmd-2.066.1
   - ldc
   - ldc-1.1.0-beta5
   - ldc-0.17.2
+  - gdc
 
 sudo: false
 
diff --git a/README.md b/README.md
index 4550822..3cdc19c 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Master: [![Build Status](https://api.travis-ci.org/mbierlee/poodinis.png?branch=
 
 Poodinis is a dependency injection framework for the D programming language. It is inspired by the [Spring Framework] and [Hypodermic] IoC container for C++. Poodinis supports registering and resolving classes either by concrete type or interface. Automatic injection of dependencies is supported through the use of UDAs or constructors.
 
-Requires at least a D 2.068.0 compatible compiler  
+Requires at least a D 2.066.1 compatible compiler  
 Uses the Phobos standard library  
 Can be built with DUB 0.9.24 or higher
 
diff --git a/source/poodinis/autowire.d b/source/poodinis/autowire.d
index 0aa4513..61715b4 100644
--- a/source/poodinis/autowire.d
+++ b/source/poodinis/autowire.d
@@ -21,6 +21,7 @@ import poodinis.container;
 import poodinis.registration;
 import poodinis.factory;
 import poodinis.valueinjection;
+import poodinis.polyfill;
 
 import std.exception;
 import std.stdio;
diff --git a/source/poodinis/context.d b/source/poodinis/context.d
index c384d4c..83b1729 100644
--- a/source/poodinis/context.d
+++ b/source/poodinis/context.d
@@ -16,6 +16,7 @@ module poodinis.context;
 import poodinis.container;
 import poodinis.registration;
 import poodinis.factory;
+import poodinis.polyfill;
 
 import std.traits;
 
diff --git a/source/poodinis/factory.d b/source/poodinis/factory.d
index 17c2ce6..9d2f9a3 100644
--- a/source/poodinis/factory.d
+++ b/source/poodinis/factory.d
@@ -16,9 +16,9 @@ import poodinis.container;
 import std.typecons;
 import std.exception;
 import std.traits;
-import std.meta;
 import std.string;
 import std.stdio;
+import poodinis.polyfill;
 
 alias CreatesSingleton = Flag!"CreatesSingleton";
 alias InstanceFactoryMethod = Object delegate();
diff --git a/source/poodinis/polyfill.d b/source/poodinis/polyfill.d
index 1178eb3..43a5c6d 100644
--- a/source/poodinis/polyfill.d
+++ b/source/poodinis/polyfill.d
@@ -14,18 +14,70 @@
 module poodinis.polyfill;
 
 import std.exception;
+import std.traits;
 
 static if (!__traits(compiles, basicExceptionCtors)) {
 	mixin template basicExceptionCtors()
 	{
-		this(string msg, string file = __FILE__, size_t line = __LINE__, Throwable next = null) @nogc @safe pure nothrow
+		this(string msg, string file = __FILE__, size_t line = __LINE__, Throwable next = null) @safe pure nothrow
 		{
 			super(msg, file, line, next);
 		}
 
-		this(string msg, Throwable next, string file = __FILE__, size_t line = __LINE__) @nogc @safe pure nothrow
+		this(string msg, Throwable next, string file = __FILE__, size_t line = __LINE__) @safe pure nothrow
 		{
 			super(msg, file, line, next);
 		}
 	}
 }
+
+static if (!__traits(compiles, enforce!Exception(true, "Message"))) {
+	T enforce(E: Exception, T)(T value, string message) {
+		if (value) {
+			return value;
+		}
+
+		throw new E(message);
+	}
+}
+
+static if (!__traits(compiles, FieldNameTuple)) {
+	private enum NameOf(alias T) = T.stringof;
+
+	template FieldNameTuple(T)
+	{
+		import std.typetuple : staticMap;
+		static if (is(T == struct) || is(T == union))
+			alias FieldNameTuple = staticMap!(NameOf, T.tupleof[0 .. $ - isNested!T]);
+		else static if (is(T == class))
+			alias FieldNameTuple = staticMap!(NameOf, T.tupleof);
+		else
+			alias FieldNameTuple = TypeTuple!"";
+	}
+}
+
+static if (!__traits(compiles, hasUDA)) {
+	template hasUDA(alias symbol, alias attribute)
+	{
+		public static bool hasUda() {
+			foreach(uda; __traits(getAttributes, symbol)) {
+				if (is(uda == attribute)) {
+					return true;
+				}
+			}
+			return false;
+		}
+		enum hasUDA = hasUda();
+	}
+}
+
+static if (!__traits(compiles, Parameters)) {
+	template Parameters(func...)
+		if (func.length == 1 && isCallable!func)
+	{
+		static if (is(FunctionTypeOf!func P == function))
+			alias Parameters = P;
+		else
+			static assert(0, "argument has no parameters");
+	}
+}