diff --git a/recipes/CMakeProject/recipe.py b/recipes/CMakeProject/recipe.py
index 80d5823..d182c82 100644
--- a/recipes/CMakeProject/recipe.py
+++ b/recipes/CMakeProject/recipe.py
@@ -21,7 +21,9 @@ def cook(env: Environment, project_root: str, generate_args: 'list[str]' = [], b
             'release': 'Release',
             'profile': 'RelWithDebInfo'
         }.get(env['BUILD_TYPE'], 'RelWithDebInfo')
-        subprocess.run(('cmake', '-G', 'Ninja', '-B', build_dir, f'-DCMAKE_BUILD_TYPE={build_type}', f'-DCMAKE_INSTALL_PREFIX={install_dir}', *generate_args, project_root), stdout=sys.stdout, stderr=sys.stderr, check=True)
+        environ = os.environ.copy()
+        environ['CXXFLAGS'] = ' '.join(f'-D{define}' for define in env['CPPDEFINES']) # TODO: who cares about windows?
+        subprocess.run(('cmake', '-G', 'Ninja', '-B', build_dir, f'-DCMAKE_BUILD_TYPE={build_type}', f'-DCMAKE_INSTALL_PREFIX={install_dir}', '-DBUILD_TESTING=OFF', *generate_args, project_root), env=environ, stdout=sys.stdout, stderr=sys.stderr, check=True)
         subprocess.run(('cmake', '--build', *build_args, build_dir), stdout=sys.stdout, stderr=sys.stderr, check=True)
         subprocess.run(('cmake', '--install', *install_args, build_dir), stdout=sys.stdout, stderr=sys.stderr, check=True)
         pathlib.Path(install_dir, _BUILT_STAMPFILE).touch()
diff --git a/recipes/SDL/recipe.py b/recipes/SDL/recipe.py
index 3d84b87..1e2b269 100644
--- a/recipes/SDL/recipe.py
+++ b/recipes/SDL/recipe.py
@@ -1,7 +1,4 @@
 
-import os
-import subprocess
-import sys
 from SCons.Script import *
 
 def cook(env: Environment, git_ref: str = "main") -> dict:
diff --git a/recipes/yaml-cpp/recipe.py b/recipes/yaml-cpp/recipe.py
new file mode 100644
index 0000000..64c6937
--- /dev/null
+++ b/recipes/yaml-cpp/recipe.py
@@ -0,0 +1,15 @@
+from SCons.Script import *
+
+def cook(env: Environment, git_ref: str = "master") -> dict:
+    repo = env.Cook('GitBranch', repo_name = 'yaml-cpp', remote_url = 'https://github.com/jbeder/yaml-cpp', git_ref = git_ref)
+    checkout_root = repo['checkout_root']
+    build_result = env.Cook('CMakeProject', project_root=checkout_root)
+    lib_name = {
+        'debug': 'yaml-cppd'
+    }.get(env['BUILD_TYPE'], 'yaml-cppd')
+    return {
+        'LIBPATH': build_result['LIBPATH'],
+        'CPPPATH': build_result['CPPPATH'],
+        'LIBS': [lib_name]
+    }
+