diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..a1721bd
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,13 @@
+Copyright 2025 Stephan Menzel
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..770fe81
--- /dev/null
+++ b/README.md
@@ -0,0 +1,76 @@
+# Depper Dan
+#### Windows Library Builds made easi(er)
+
+## About
+
+Depper Dan is a collection of scripts to enable (CMake based) C++ projects
+with a set of open source dependencies to build them
+automatically.
+
+## Motivation
+
+Unlike Linuxoid systems, C++ projects that use Open Source dependencies
+traditionally have a hard time building those dependencies, 
+especially automatic, with custom build settings or when they
+depend on one another.
+
+This script realizes this in a re-usable and extendable manner
+but only for a limited set of libraries. It is meant to be used
+with Visual Studio 2022 for build tools and modern CMake.
+
+## Usage
+
+### Prerequisites
+
+* Visual Studio (2022 was what this was developed for but others might work)
+* git (available in the Path)
+* CMake (available in the Path)
+* Python (3.11, 3.12, etc)
+* This repository, checked out and with temporary disk space
+
+### Available packages
+
+Each package that can be built with this system must be 
+given in `packages.jon`. For every package therein, you will 
+find a build script in the folder `build_functions`.
+
+### Build
+
+To use the system, you must specify an installation folder.
+It should have as short a name as possible (on windows) to avoid MAX_PATH issues
+which may arise out of any build.
+In the examples below we will use `C:\devel\3rd_party`.
+This directory will be used to install each package built
+with Depper Dan and it should be considered stable and system
+wide. 
+
+As a shell, use "x64 Native Tools Command Prompt" to ensure 
+the correct build tools and environment being set.
+
+Create a venv unless it's already present and activate it
+```PowerShell
+> cd /depper/dan/repo
+> python -m venv .venv
+> .venv\Scripts\Activate
+```
+
+Build a single package into your installation dir
+```PowerShell
+> python .\depper_dan.py -i C:\devel\3rd_party -p zlib
+```
+
+## Extension
+
+This script is meant to be hacked on. It is not meant 
+to be a complete extensible package manager like conan or [vcpkg](https://vcpkg.io).
+
+Extending it by more packages generally involves:
+
+* Add package information in `packages.jon`.
+* Add a build function in `build_functions`.
+
+
+## License
+
+Depper Dan is being published under the 
+Apache License 2.0
\ No newline at end of file
diff --git a/build_functions/build_abseil.py b/build_functions/build_abseil.py
index 90be636..e70f62a 100644
--- a/build_functions/build_abseil.py
+++ b/build_functions/build_abseil.py
@@ -13,7 +13,7 @@ from common.git_helpers import clone_git_tag
 from package.package_info import get_package_info
 
 
-def build_abseil(prefix: Path | str, sbom: dict):
+def build_abseil_cpp(prefix: Path | str, sbom: dict) -> Path:
 
     print_banner("Building Abseil")
 
@@ -33,8 +33,8 @@ def build_abseil(prefix: Path | str, sbom: dict):
 
     # Abseil LTS doesn't build with CMake>=3.30 due to some imported GTest target.
     # Gotta patch that shit until this situation is resolved. https://github.com/abseil/abseil-cpp/issues/690
-    with pushd(abseil_dir):
-        subprocess.run(["git", "apply", "..\\..\\gtest_fix.patch"])
+    # with pushd(abseil_dir):
+    #     subprocess.run(["git", "apply", "..\\..\\gtest_fix.patch"])
 
     install_dir = cmake_build_install(abseil_dir, package_info, cmake_args=abseil_cmake_args)
     write_package_version_batch(package_info.version)
diff --git a/build_functions/build_cares.py b/build_functions/build_cares.py
index 69a8673..e7b3091 100644
--- a/build_functions/build_cares.py
+++ b/build_functions/build_cares.py
@@ -11,7 +11,7 @@ from common.git_helpers import clone_git_tag
 from package.package_info import get_package_info
 
 
-def build_cares(prefix: Path | str, sbom: dict):
+def build_c_ares(prefix: Path, sbom: dict) -> Path:
 
     print_banner("Building C-Ares (gRPC Dependency)")
 
diff --git a/build_functions/build_grpc.py b/build_functions/build_grpc.py
index b0c535b..80dc57a 100644
--- a/build_functions/build_grpc.py
+++ b/build_functions/build_grpc.py
@@ -6,13 +6,13 @@ from pathlib import Path
 
 from build_functions.build_utils import print_banner
 from common.azure import write_package_version_batch
-from common.cmake import cmake_build_install
+from common.cmake import cmake_build_install, assemble_prefix_path
 from common.git_helpers import clone_git_tag
 import common.settings
 from package.package_info import get_package_info
 
 
-def build_grpc(prefix: Path | str, sbom: dict):
+def build_grpc(prefix: Path, sbom: dict) -> Path:
 
     print_banner("Building gRPC")
 
@@ -24,12 +24,16 @@ def build_grpc(prefix: Path | str, sbom: dict):
 
     package_info.add_to_sbom(sbom)
 
+    deps = [
+        package_info.dependency("zlib"),
+        package_info.dependency("re2"),
+        package_info.dependency("openssl"),
+        package_info.dependency("abseil-cpp"),
+        package_info.dependency("c-ares"),
+        package_info.dependency("protobuf")
+    ]
+
     zlib_install_path = package_info.dependency_path("zlib")
-    re2_install_path = package_info.dependency_path("re2")
-    openssl_install_path = package_info.dependency_path("openssl")
-    abseil_install_path = package_info.dependency_path("abseil-cpp")
-    cares_install_path = package_info.dependency_path("c-ares")
-    protobuf_install_path = package_info.dependency_path("protobuf")
 
     grpc_cmake_args = [
         ("BUILD_SHARED_LIBS:BOOL", "OFF"),
@@ -45,27 +49,23 @@ def build_grpc(prefix: Path | str, sbom: dict):
         # ("gRPC_BUILD_MSVC_MP_COUNT:STRING", "1"),
         # ("gRPC_DOWNLOAD_ARCHIVES:BOOL", "ON"),
         ("gRPC_ABSL_PROVIDER:STRING", "package"),
-        ("absl_DIR:PATH", str(abseil_install_path / "lib" / "cmake" / "absl")),
         ("gRPC_CARES_PROVIDER:STRING", "package"),
-        ("c-ares_DIR:PATH", str(cares_install_path / "lib" / "cmake" / "c-ares")),
         ("gRPC_PROTOBUF_PROVIDER:STRING", "package"),
-        ("Protobuf_DIR:PATH", str(protobuf_install_path / "cmake")),
-        ("utf8_range_DIR:PATH", str(protobuf_install_path / "lib" / "cmake" / "utf8_range")),
-
         ("gRPC_SSL_PROVIDER", "package"),
-        ("OPENSSL_ROOT_DIR:PATH", openssl_install_path),
+        ("gRPC_RE2_PROVIDER", "package"),
+        ("gRPC_ZLIB_PROVIDER:STRING", "package"),
+
+        ("CMAKE_PREFIX_PATH:STRING", assemble_prefix_path(deps)),
+
+        # ("OPENSSL_ROOT_DIR:PATH", openssl_install_path),
         ("OPENSSL_USE_STATIC_LIBS:BOOL", "ON"),
 
-        ("gRPC_RE2_PROVIDER", "package"),
-        ("re2_DIR:PATH", str(re2_install_path / "lib" / "cmake" / "re2")),
-
-        ("gRPC_ZLIB_PROVIDER:STRING", "package"),
         ("ZLIB_ROOT:PATH", str(zlib_install_path)),
         ("ZLIB_USE_STATIC_LIBS:BOOL", "ON"),  # doesn't appear to do its job
         ("ZLIB_LIBRARY_RELEASE:FILEPATH", str(zlib_install_path / "lib" / common.settings.zlib_static_lib_name)),
         ("ZLIB_LIBRARY_DEBUG:FILEPATH", str(zlib_install_path / "lib" / common.settings.zlib_static_lib_name))
     ]
-    grpc_dir = clone_git_tag(package_info, recursive=True)
+    grpc_dir = clone_git_tag(package_info, recursive=False)
     install_dir = cmake_build_install(grpc_dir, package_info, cmake_args=grpc_cmake_args)
     write_package_version_batch(package_info.version)
     return install_dir
diff --git a/build_functions/build_openssl.py b/build_functions/build_openssl.py
index 72186cf..98a8c81 100644
--- a/build_functions/build_openssl.py
+++ b/build_functions/build_openssl.py
@@ -14,7 +14,7 @@ import common.settings
 from package.package_info import get_package_info
 
 
-def build_openssl(prefix: Path | str, sbom: dict):
+def build_openssl(prefix: Path, sbom: dict):
 
     print_banner("Building OpenSSL")
 
@@ -30,7 +30,7 @@ def build_openssl(prefix: Path | str, sbom: dict):
 
     with pushd(openssl_dir):
 
-        install_prefix = get_local_prefix(prefix)
+        install_prefix = package_info.install_location()
 
         if not common.settings.rebuild and Path("built_and_installed.txt").exists():
             file_and_console_log("already built, exiting")
diff --git a/build_functions/build_openusd.py b/build_functions/build_openusd.py
index 8b31756..177133d 100644
--- a/build_functions/build_openusd.py
+++ b/build_functions/build_openusd.py
@@ -6,12 +6,13 @@ from pathlib import Path
 
 from build_functions.build_utils import print_banner
 from common.azure import write_package_version_batch
-from common.cmake import cmake_build_install, assemble_prefix_path
+from common.cmake import cmake_build_install, assemble_prefix_path, CMakeBuildType
 import common.settings
 from common.git_helpers import clone_git_tag
 from common.settings import temporarily_set_shared
 from package.package_info import get_package_info
 
+
 def build_openusd(prefix: Path | str, sbom: dict):
 
     print_banner("Building OpenUSD")
@@ -47,11 +48,11 @@ def build_openusd(prefix: Path | str, sbom: dict):
 
             ("CMAKE_PREFIX_PATH:STRING", assemble_prefix_path(deps)),
             ("ZLIB_ROOT:PATH", str(zlib_install_path.as_posix())),
-            ("ZLIB_USE_STATIC_LIBS:BOOL", "ON"),  # doesn't appear to do its job
+            ("ZLIB_USE_STATIC_LIBS:BOOL", "ON"),
             ("ZLIB_LIBRARY_RELEASE:FILEPATH", str(zlib_install_path / "lib" / common.settings.zlib_static_lib_name)),
             ("ZLIB_LIBRARY_DEBUG:FILEPATH", str(zlib_install_path / "lib" / common.settings.zlib_static_lib_name))
         ]
         src_dir = clone_git_tag(package_info, recursive=False)
-        install_dir = cmake_build_install(src_dir, package_info, cmake_args=cmake_args)
+        install_dir = cmake_build_install(src_dir, package_info, cmake_args=cmake_args, build_type=CMakeBuildType.RELWITHDEBINFO)
         write_package_version_batch(package_info.version)
         return install_dir
diff --git a/build_functions/build_re2.py b/build_functions/build_re2.py
index 2b743c3..1cd07bb 100644
--- a/build_functions/build_re2.py
+++ b/build_functions/build_re2.py
@@ -11,7 +11,7 @@ from common.git_helpers import clone_git_tag
 from package.package_info import get_package_info
 
 
-def build_re2(prefix: Path | str, sbom: dict):
+def build_re2(prefix: Path | str, sbom: dict) -> None:
 
     print_banner("Building re2")
 
diff --git a/common/cmake.py b/common/cmake.py
index 269b650..f6da137 100644
--- a/common/cmake.py
+++ b/common/cmake.py
@@ -3,6 +3,7 @@
 # See attached file LICENSE for full details
 
 import os
+from enum import Enum
 from pathlib import Path
 
 from build_functions.build_utils import file_and_console_log, run_in_shell
@@ -11,7 +12,17 @@ import common.settings
 from package.package_info import PackageInfo
 
 
-def cmake_build_install(local_directory, package_info: PackageInfo, cmake_args: list[tuple[str, str]] = []):
+class CMakeBuildType(Enum):
+    RELEASE = (1, "Release")
+    RELWITHDEBINFO = (2, "RelWithDebInfo")
+    DEBUG = (3, "Debug")
+
+    def __init__(self, num, label):
+        self._num = num
+        self.label = label
+
+def cmake_build_install(local_directory, package_info: PackageInfo, cmake_args: list[tuple[str, str]] = [],
+                        build_type: CMakeBuildType = CMakeBuildType.RELEASE) -> Path:
     argstr = ""
 
     # Create flags string out of args tuples
@@ -39,7 +50,7 @@ def cmake_build_install(local_directory, package_info: PackageInfo, cmake_args:
             run_in_shell(f"cmake .. {common.settings.cmake_toolset} -DCMAKE_CONFIGURATION_TYPES:STRING=Release "
                          f"{argstr} -DCMAKE_INSTALL_PREFIX={install_prefix}")
 
-            run_in_shell(f'cmake --build . --config Release --target INSTALL --parallel {common.settings.num_cores}')
+            run_in_shell(f'cmake --build . --config {build_type.label} --target INSTALL --parallel {common.settings.num_cores}')
 
             with open("built_and_installed.txt", "w") as lockfile:
                 lockfile.write(f"built release")
@@ -51,5 +62,5 @@ def cmake_build_install(local_directory, package_info: PackageInfo, cmake_args:
     return install_prefix
 
 def assemble_prefix_path(packages: list[PackageInfo]) -> str:
-    paths = [str(pkg.install_location()) for pkg in packages]
-    return ";".join(paths)
\ No newline at end of file
+    paths = [str(pkg.install_location().as_posix()) for pkg in packages]
+    return ";".join(paths)
diff --git a/common/settings.py b/common/settings.py
index fd229ca..93a535a 100644
--- a/common/settings.py
+++ b/common/settings.py
@@ -26,13 +26,11 @@ run_in_buildpipeline = "BUILD_ARTIFACTSTAGINGDIRECTORY" in os.environ
 num_cores = 3 if run_in_buildpipeline else 6
 
 if os.name == "posix":
-    cmake_config_flag = "CMAKE_BUILD_TYPE=Release"
     cmake_toolset = ""
     lib_wildcard = "*.a"
     dll_wildcard = "*.so"
     zlib_static_lib_name = "libz.a"
 elif os.name == "nt":  # Windows
-    cmake_config_flag = "CMAKE_CONFIGURATION_TYPES:STRING=Release"
     cmake_toolset = "-T v143"
     boost_toolset = "msvc-" + cmake_toolset[-3:-1] + "." + cmake_toolset[-1]
     boost_bootstrap_toolset = "vc" + cmake_toolset[-3:-1] + cmake_toolset[-1]
@@ -53,7 +51,8 @@ cmake_global_flags = [
     ("CMAKE_CXX_STANDARD_REQUIRED:BOOL", "ON"),
     ("CMAKE_MSVC_RUNTIME_LIBRARY:STRING", "\"MultiThreadedDLL\""),
     ("CMAKE_POSITION_INDEPENDENT_CODE:BOOL", "ON"),
-    ("CMAKE_BUILD_TYPE:STRING", "Release")
+    ("CMAKE_CONFIGURATION_TYPES:STRING", "Release;RelWithDebInfo"),
+    # ("CMAKE_BUILD_TYPE:STRING", "Release")
 ]
 
 def set_global_rebuild(new_rebuild: bool = False) -> None:
diff --git a/build_deps.py b/depper_dan.py
similarity index 82%
rename from build_deps.py
rename to depper_dan.py
index fc5abe0..3355ab1 100644
--- a/build_deps.py
+++ b/depper_dan.py
@@ -15,10 +15,10 @@ import importlib
 from build_functions.build_ecal import build_ecal
 from build_functions.build_ecaludp import build_ecaludp
 from build_functions.build_ftxui import build_ftxui
-from build_functions.build_abseil import build_abseil
+from build_functions.build_abseil import build_abseil_cpp
 from build_functions.build_asio import build_asio
 from build_functions.build_boost import build_boost
-from build_functions.build_cares import build_cares
+from build_functions.build_cares import build_c_ares
 from build_functions.build_ceres import build_ceres
 from build_functions.build_curl import  build_curl
 from build_functions.build_cppzmq import build_cppzmq
@@ -58,7 +58,7 @@ from package.package_info import PackageInfo, get_package_info, build_package_tr
 import sys
 from pathlib import Path
 
-from common.errors import DependencyInfoError
+from common.errors import DependencyInfoError, BuildError
 
 from build_functions.build_utils import print_banner, file_and_console_log, logfile
 
@@ -89,10 +89,10 @@ def build_all(prefix: Path | str) -> dict:
     file_and_console_log(f"Installing to: {prefix}")
 
     # First those without any dependencies
-    build_abseil(prefix, sbom)
+    build_abseil_cpp(prefix, sbom)
     build_asio(prefix, sbom)
     build_boost(prefix, sbom)
-    build_cares(prefix, sbom)
+    build_c_ares(prefix, sbom)
     build_ftxui(prefix, sbom)
     build_glog(prefix, sbom)
     build_eigen(prefix, sbom)
@@ -140,7 +140,7 @@ def build_all(prefix: Path | str) -> dict:
 
 
 build_functions = {
-    "abseil-cpp": build_abseil,
+    "abseil-cpp": build_abseil_cpp,
     "asio": build_asio,
     "boost": build_boost,
     "ceres-solver": build_ceres,
@@ -168,7 +168,7 @@ build_functions = {
     "recycle": build_recycle,
     "spdlog": build_spdlog,
     "tclap": build_tclap,
-    "c-ares": build_cares,
+    "c-ares": build_c_ares,
     "grpc": build_grpc,
     "qt5": build_qt5,
     "qt6": build_qt6,
@@ -181,13 +181,50 @@ build_functions = {
     "zlib": build_zlib,
 }
 
+def call_builder(package_name: str) -> None:
+    """Call a build function by name or throw if it doesn't exist
+    """
+    func_name = f"build_{package_name.lower().replace('-', '_')}"
+    func = globals().get(func_name)
+    if callable(func):
+
+        sbom = {}
+
+        # Build the package, amend SBOM with package info
+        func(prefix=Path(), sbom=sbom)
+
+        # The partial SBOM gets written into the install dir so we can later combine it.
+        # We cannot merge them into one file right here as in the pipeline there may be multiple tasks in parallel
+        package_info = get_package_info(package_name)
+        partial_sbom_filename = package_info.install_location() / "partial_sbom.json"
+        with open(partial_sbom_filename, "w") as f:
+            json.dump(sbom, f)
+
+    else:
+        raise DependencyInfoError(f"Don't know how to build {package_name}")
+
+
+def build_package(package_name: str) -> None:
+    """Build the named package including all of its dependencies
+    """
+    package_info = get_package_info(package_name)
+    deps = package_info.get_dependencies()
+
+    # Build the dependencies first
+    for d in deps:
+        call_builder(d)
+
+    # And then the actual package
+    call_builder(package_name)
+
+
 if __name__ == '__main__':
 
     try:
         with open(logfile, 'w') as f:
             f.write(str(datetime.datetime.now()) + f' - started {__file__}\n')
 
-        parser = argparse.ArgumentParser()
+        parser = argparse.ArgumentParser("Depper Dan")
         parser.add_argument("--install-dir", "-i", type=str, required=True, help="install into this directory")
         parser.add_argument("--package", "-p", type=str, default="all", help="build specific package or 'all'")
         parser.add_argument("--rebuild", action="store_true", help="always delete build dir")
@@ -220,20 +257,7 @@ if __name__ == '__main__':
             with open(sbomfile, "w") as f:
                 json.dump(sbom, f)
         else:
-            if package not in build_functions:
-                raise DependencyInfoError(f"Don't know how to build {package}")
-
-            sbom = {}
-
-            # Build the package, amend SBOM with package info
-            build_functions[package](prefix=global_prefix, sbom=sbom)
-
-            # The partial SBOM gets written into the install dir so we can later combine it.
-            # We cannot merge them into one file right here as in the pipeline there may be multiple tasks in parallel
-            package_info = get_package_info(package)
-            partial_sbom_filename = package_info.install_location() / "partial_sbom.json"
-            with open(partial_sbom_filename, "w") as f:
-                json.dump(sbom, f)
+            build_package(package)
 
         print_banner("Done")
         exit(0)
diff --git a/package/package_info.py b/package/package_info.py
index 6e6a979..c7a79d7 100644
--- a/package/package_info.py
+++ b/package/package_info.py
@@ -64,6 +64,22 @@ class PackageInfo:
             raise DependencyInfoError(f"Cannot find dependency {package_name} in {self.name}.")
         return self.dependencies[package_name]
 
+    def get_dependencies(self) -> list[str]:
+        """Hand out all the dependencies in order of suitable build
+            Those without any dependencies will be first, then the ones depending on the above
+        """
+
+        deps_0 = set[str]()
+        deps_1 = set[str]()
+
+        # I should be recursive here but right now I'm too lazy for this
+        for name, info in self.dependencies.items():
+            if len(info.dependencies) == 0:
+                deps_0.add(name)
+            else:
+                deps_1.add(name)
+        return list(deps_0) + list(deps_1)
+
     def dependency_path(self, package_name: str) -> Path:
         """Give the path underneath which the package, according to its version, is installed"""
         if package_name not in self.dependencies:
diff --git a/packages.json b/packages.json
index d7ef8a5..074daf9 100644
--- a/packages.json
+++ b/packages.json
@@ -1,8 +1,8 @@
 {
   "abseil-cpp": {
     "repo": "https://github.com/abseil/abseil-cpp.git",
-    "tag": "20240116.2",
-    "version": "24.1.16",
+    "tag": "20250127.1",
+    "version": "25.1.27",
     "description": "Collection of peer reviewed C++ libraries by Google",
     "license_id": "Apache-2.0",
     "license_url": "https://github.com/abseil/abseil-cpp/blob/master/LICENSE"
@@ -252,8 +252,8 @@
   },
   "openssl": {
     "repo": "https://github.com/openssl/openssl.git",
-    "tag": "openssl-3.2.4",
-    "version": "3.2.4",
+    "tag": "openssl-3.2.5",
+    "version": "3.2.5",
     "depends": [
       "zlib"
     ],
@@ -317,8 +317,8 @@
   },
   "grpc": {
     "repo": "https://github.com/grpc/grpc.git",
-    "tag": "v1.65.1",
-    "version": "1.65.1",
+    "tag": "v1.72.2",
+    "version": "1.72.2",
     "depends": [
       "zlib",
       "re2",