diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1d27958..4952715 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -234,9 +234,10 @@ if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
       OPTIONAL_COMPONENTS dia)
 
     if(Doxygen_FOUND)
+      message(STATUS "Found Doxygen, building the docs")
       add_subdirectory(docs)
     else()
-      message(STATUS "Doxygen not found, not building docs")
+      message(STATUS "Doxygen not found, not building the docs")
     endif()
   endif()
 endif()
diff --git a/builder b/builder
index 6115d3e..f6c8f1b 100755
--- a/builder
+++ b/builder
@@ -135,7 +135,7 @@ function build-release() { ## Builds the project in "Release" mode
 function build-docs() { ## Builds the documentation of Serene
     clean
     pushed_build
-    cmake -G Ninja -DCMAKE_BUILD_TYPE=Docs "$ROOT_DIR"
+    cmake -G Ninja -DSERENE_ENABLE_DOCS=ON "$ROOT_DIR"
     cmake --build .
     popd_build
 }
diff --git a/include/serene/diagnostics.h b/include/serene/diagnostics.h
index 3a82162..b730927 100644
--- a/include/serene/diagnostics.h
+++ b/include/serene/diagnostics.h
@@ -84,6 +84,9 @@ protected:
   void writeColorByType(llvm::raw_ostream &os, llvm::StringRef str);
 };
 
+/// DiagnosticEngine is the central hub for dealing with errors in Serene. It
+/// integrates with MLIR's diag engine and LLVM's error system to handle error
+/// reporting for Serene's compiler
 class DiagnosticEngine {
   SereneContext &ctx;
 
@@ -108,6 +111,10 @@ public:
 /// `SereneContext`
 std::unique_ptr<DiagnosticEngine> makeDiagnosticEngine(SereneContext &ctx);
 
+// ----------------------------------------------------------------------------
+// Public API
+// ----------------------------------------------------------------------------
+
 /// Throw out an error with the given \p and terminate the execution.
 SERENE_EXPORT void panic(SereneContext &ctx, llvm::Twine msg);
 
diff --git a/include/serene/exprs/expression.h b/include/serene/exprs/expression.h
index 3a1ee0e..6080578 100644
--- a/include/serene/exprs/expression.h
+++ b/include/serene/exprs/expression.h
@@ -46,7 +46,7 @@ using MaybeNode = llvm::Expected<Node>;
 using Ast      = std::vector<Node>;
 using MaybeAst = llvm::Expected<Ast>;
 
-static auto EmptyNode = nullptr;
+constexpr static auto EmptyNode = nullptr;
 
 /// The base class of the expressions which provides the common interface for
 /// the expressions to implement.
diff --git a/include/serene/serene.h b/include/serene/serene.h
index bb77f17..c52806f 100644
--- a/include/serene/serene.h
+++ b/include/serene/serene.h
@@ -40,13 +40,12 @@ SERENE_EXPORT void registerSereneCLOptions();
 /// function has to be called after `llvm::cl::ParseCommandLineOptions`.
 SERENE_EXPORT void applySereneCLOptions(SereneContext &ctx);
 
-/// Reads the the given \p input as a Serene source code in the given
+/// \brief Reads the the given \p input as Serene source code in the given
 /// \c SereneContext \p ctx and returns the possible AST tree of the input or an
 /// error otherwise.
 ///
-/// In case of an error Serene will throw the error messages vis the diagnostic
-/// engine as well and the error that this function returns will be the generic
-/// error message.
+/// If any thing goes wrong it will return an \return \c llvm::Error describing
+/// the issue.
 ///
 /// Be aware than this function reads the input in the context of the current
 /// namespace. So for example if the input is somthing like:
diff --git a/include/serene_precompiles.h b/include/serene_precompiles.h
deleted file mode 100644
index 8b53735..0000000
--- a/include/serene_precompiles.h
+++ /dev/null
@@ -1,92 +0,0 @@
-// DO NOT EDIT THIS FILE: It is aute generated by './builder
-// gen_precompile_index'
-#ifndef SERENE_PRECOMPIL_H
-#define SERENE_PRECOMPIL_H
-#include "mlir/Dialect/StandardOps/IR/Ops.h"
-#include "mlir/IR/Attributes.h"
-#include "mlir/IR/Builders.h"
-#include "mlir/IR/BuiltinAttributes.h"
-#include "mlir/IR/BuiltinOps.h"
-#include "mlir/IR/BuiltinTypes.h"
-#include "mlir/IR/Dialect.h"
-#include "mlir/IR/Identifier.h"
-#include "mlir/IR/Location.h"
-#include "mlir/IR/MLIRContext.h"
-#include "mlir/IR/OpDefinition.h"
-#include "mlir/IR/OpImplementation.h"
-#include "mlir/IR/Value.h"
-#include "mlir/Interfaces/SideEffectInterfaces.h"
-#include "mlir/Support/LogicalResult.h"
-
-#include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/Errc.h"
-#include "llvm/Support/Error.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/ErrorOr.h"
-#include "llvm/Support/FormatVariadic.h"
-#include "llvm/Support/MemoryBuffer.h"
-
-#include <llvm/ADT/ArrayRef.h>
-#include <llvm/ADT/Optional.h>
-#include <llvm/ADT/STLExtras.h>
-#include <llvm/ADT/SmallString.h>
-#include <llvm/ADT/StringRef.h>
-#include <llvm/ExecutionEngine/JITEventListener.h>
-#include <llvm/ExecutionEngine/ObjectCache.h>
-#include <llvm/ExecutionEngine/Orc/CompileUtils.h>
-#include <llvm/ExecutionEngine/Orc/ExecutionUtils.h>
-#include <llvm/ExecutionEngine/Orc/IRCompileLayer.h>
-#include <llvm/ExecutionEngine/Orc/IRTransformLayer.h>
-#include <llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h>
-#include <llvm/ExecutionEngine/Orc/LLJIT.h>
-#include <llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h>
-#include <llvm/ExecutionEngine/SectionMemoryManager.h>
-#include <llvm/IR/LLVMContext.h>
-#include <llvm/IR/LegacyPassManager.h>
-#include <llvm/IR/Module.h>
-#include <llvm/IR/Value.h>
-#include <llvm/Support/Casting.h>
-#include <llvm/Support/CodeGen.h>
-#include <llvm/Support/CommandLine.h>
-#include <llvm/Support/Debug.h>
-#include <llvm/Support/ErrorHandling.h>
-#include <llvm/Support/FileSystem.h>
-#include <llvm/Support/FormatVariadic.h>
-#include <llvm/Support/Host.h>
-#include <llvm/Support/Path.h>
-#include <llvm/Support/TargetRegistry.h>
-#include <llvm/Support/TargetSelect.h>
-#include <llvm/Support/ToolOutputFile.h>
-#include <llvm/Support/raw_ostream.h>
-#include <llvm/Target/TargetMachine.h>
-#include <llvm/Target/TargetOptions.h>
-#include <mlir/Conversion/AffineToStandard/AffineToStandard.h>
-#include <mlir/Conversion/SCFToStandard/SCFToStandard.h>
-#include <mlir/Conversion/StandardToLLVM/ConvertStandardToLLVM.h>
-#include <mlir/Conversion/StandardToLLVM/ConvertStandardToLLVMPass.h>
-#include <mlir/Dialect/Affine/IR/AffineOps.h>
-#include <mlir/Dialect/LLVMIR/LLVMDialect.h>
-#include <mlir/Dialect/MemRef/IR/MemRef.h>
-#include <mlir/Dialect/SCF/SCF.h>
-#include <mlir/Dialect/StandardOps/IR/Ops.h>
-#include <mlir/ExecutionEngine/ExecutionEngine.h>
-#include <mlir/ExecutionEngine/OptUtils.h>
-#include <mlir/IR/Block.h>
-#include <mlir/IR/Builders.h>
-#include <mlir/IR/BuiltinOps.h>
-#include <mlir/IR/MLIRContext.h>
-#include <mlir/IR/OperationSupport.h>
-#include <mlir/IR/OwningOpRef.h>
-#include <mlir/IR/Value.h>
-#include <mlir/Pass/Pass.h>
-#include <mlir/Pass/PassManager.h>
-#include <mlir/Support/FileUtilities.h>
-#include <mlir/Support/LLVM.h>
-#include <mlir/Support/LogicalResult.h>
-#include <mlir/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.h>
-#include <mlir/Target/LLVMIR/ModuleTranslation.h>
-#include <mlir/Transforms/DialectConversion.h>
-#endif