diff --git a/meson.build b/meson.build
index fde65e4..9c8b0d5 100644
--- a/meson.build
+++ b/meson.build
@@ -18,12 +18,38 @@
 conf_data.set('CLASS_VERSION', 1)
 conf_data.set('MAX_EVENTS', 20)
 
-sdbusplus_dep = dependency('sdbusplus')
+cpp = meson.get_compiler('cpp')
+# Get Cereal dependency.
+cereal_dep = dependency('cereal', required: false)
+has_cereal = cpp.has_header_symbol(
+    'cereal/cereal.hpp',
+    'cereal::specialize',
+    dependencies: cereal_dep,
+    required: false)
+if not has_cereal
+    cereal_opts = import('cmake').subproject_options()
+    cereal_opts.add_cmake_defines({'BUILD_TESTS': 'OFF', 'SKIP_PERFORMANCE_COMPARISON': 'ON'})
+    cereal_proj = import('cmake').subproject(
+        'cereal',
+        options: cereal_opts,
+        required: false)
+    assert(cereal_proj.found(), 'cereal is required')
+    cereal_dep = cereal_proj.dependency('cereal')
+endif
+
+sdbusplus_dep = dependency('sdbusplus', required : false)
 sdeventplus_dep = dependency('sdeventplus')
 phosphor_dbus_interfaces_dep = dependency('phosphor-dbus-interfaces')
 phosphor_logging_dep = dependency('phosphor-logging')
 phosphor_snmp_dep = dependency('phosphor-snmp')
 
+sdbusplus_python_env = {}
+if not sdbusplus_dep.found()
+    sdbusplus_proj = subproject('sdbusplus')
+    sdbusplus_dep = sdbusplus_proj.get_variable('sdbusplus_dep')
+    sdbusplus_python_env = {'PYTHONPATH': meson.current_source_dir() / 'subprojects' / 'sdbusplus' / 'tools'}
+endif
+
 prog_python = find_program('python3', required: true)
 realpath_prog = find_program('realpath')
 
diff --git a/src/meson.build b/src/meson.build
index 76b8ef8..bd3a2cb 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -32,6 +32,7 @@
         'generate-cpp'
     ],
     depend_files: templates_depends,
+    env: sdbusplus_python_env,
     output: 'generated.hpp',
 )
 
@@ -49,6 +50,7 @@
 ]
 
 deps = [
+    cereal_dep,
     sdbusplus_dep,
     sdeventplus_dep,
     phosphor_dbus_interfaces_dep,
diff --git a/src/test/meson.build b/src/test/meson.build
index a1ae8e3..ba4ff6e 100644
--- a/src/test/meson.build
+++ b/src/test/meson.build
@@ -36,6 +36,7 @@
         'yaml/pathgentest/groupone.yaml',
         'yaml/pathgentest/grouptwo.yaml',
     ],
+    env: sdbusplus_python_env,
     output: 'pathgentest.hpp',
 )
 
@@ -50,7 +51,7 @@
     pathgentest_sources,
     build_by_default: false,
     include_directories: ['..'],
-    dependencies: [gtest_dep, gmock_dep]
+    dependencies: [gtest_dep, gmock_dep, phosphor_dbus_interfaces_dep]
   ))
 
 
@@ -71,6 +72,7 @@
         'yaml/propertygentest/groupone.yaml',
         'yaml/propertygentest/grouptwo.yaml',
     ],
+    env: sdbusplus_python_env,
     output: 'propertygentest.hpp',
 )
 
@@ -85,7 +87,7 @@
     propertygentest_sources,
     build_by_default: false,
     include_directories: ['..'],
-    dependencies: [gtest_dep, gmock_dep]
+    dependencies: [gtest_dep, gmock_dep, phosphor_dbus_interfaces_dep]
   ))
 
 
@@ -106,6 +108,7 @@
         'yaml/propertywatchgentest/watchone.yaml',
         'yaml/propertywatchgentest/watchtwo.yaml',
     ],
+    env: sdbusplus_python_env,
     output: 'propertywatchgentest.hpp',
 )
 
@@ -120,7 +123,7 @@
     propertywatchgentest_sources,
     build_by_default: false,
     include_directories: ['..'],
-    dependencies: [gtest_dep, gmock_dep]
+    dependencies: [gtest_dep, gmock_dep, phosphor_dbus_interfaces_dep]
   ))
 
 
@@ -141,6 +144,7 @@
         'yaml/callbackgentest/one.yaml',
         'yaml/callbackgentest/two.yaml',
     ],
+    env: sdbusplus_python_env,
     output: 'callbackgentest.hpp',
 )
 
@@ -155,7 +159,7 @@
     callbackgentest_sources,
     build_by_default: false,
     include_directories: ['..'],
-    dependencies: [gtest_dep, gmock_dep]
+    dependencies: [gtest_dep, gmock_dep, phosphor_dbus_interfaces_dep]
   ))
 
 
@@ -175,6 +179,7 @@
         'templates/callbackgroupgentest.mako.hpp',
         'yaml/callbackgroupgentest/test.yaml',
     ],
+    env: sdbusplus_python_env,
     output: 'callbackgroupgentest.hpp',
 )
 
@@ -189,7 +194,7 @@
     callbackgroupgentest_sources,
     build_by_default: false,
     include_directories: ['..'],
-    dependencies: [gtest_dep, gmock_dep]
+    dependencies: [gtest_dep, gmock_dep, phosphor_dbus_interfaces_dep]
   ))
 
 
@@ -209,6 +214,7 @@
         'templates/conditiongentest.mako.hpp',
         'yaml/conditiongentest/test.yaml',
     ],
+    env: sdbusplus_python_env,
     output: 'conditiongentest.hpp',
 )
 
@@ -223,7 +229,7 @@
     conditiongentest_sources,
     build_by_default: false,
     include_directories: ['..'],
-    dependencies: [gtest_dep, gmock_dep]
+    dependencies: [gtest_dep, gmock_dep, phosphor_dbus_interfaces_dep]
   ))
 
 
@@ -238,6 +244,7 @@
 ]
 
 callbacktest_deps = [
+    cereal_dep,
     sdbusplus_dep,
     sdeventplus_dep,
     phosphor_dbus_interfaces_dep,
@@ -272,6 +279,7 @@
         'templates/interfaceaddtest.mako.hpp',
         'yaml/interfaceaddtest/one.yaml',
     ],
+    env: sdbusplus_python_env,
     output: 'interfaceaddtest.hpp',
 )
 
@@ -286,5 +294,5 @@
     interfaceaddtest_sources,
     build_by_default: false,
     include_directories: ['..'],
-    dependencies: [gtest_dep, gmock_dep]
+    dependencies: [gtest_dep, gmock_dep, phosphor_dbus_interfaces_dep, sdeventplus_dep]
   ))