diff --git a/loadgen/pyproject.toml b/loadgen/pyproject.toml
index f62b2c5f7..9be24eea6 100755
--- a/loadgen/pyproject.toml
+++ b/loadgen/pyproject.toml
@@ -4,4 +4,4 @@ build-backend = "setuptools.build_meta:__legacy__"
 
 [tool.cibuildwheel]
 environment = "CFLAGS='-std=c++14'"
-build = "cp3{7,8,9,10,11}-*"
+build = "cp3{7,8,9,10,11,12}-*"
diff --git a/loadgen/setup.py b/loadgen/setup.py
index d7b8224de..67f88b8ec 100644
--- a/loadgen/setup.py
+++ b/loadgen/setup.py
@@ -40,6 +40,9 @@
     "query_sample_library.h",
     "system_under_test.h",
     "test_settings.h",
+    "issue_query_controller.h",
+    "early_stopping.h",
+    "query_dispatch_library.h",
 ]
 
 lib_headers = [
@@ -49,6 +52,8 @@
     "utils.h",
     "version.h",
     "results.h",
+    "bindings/c_api.h",
+    "version_generator.py"
 ]
 
 lib_sources = [
@@ -63,6 +68,7 @@
 ]
 
 lib_bindings = [
+    "bindings/c_api.cc",
     "bindings/python_api.cc",
 ]
 
diff --git a/loadgen/version_generator.py b/loadgen/version_generator.py
index 4de930a63..2c5d11331 100644
--- a/loadgen/version_generator.py
+++ b/loadgen/version_generator.py
@@ -69,7 +69,6 @@ def generate_loadgen_version_definitions_sha1(ofile, loadgen_root):
     sha1s = ""
     loadgen_files = (
         ["/bindings/" + s for s in os.listdir(loadgen_root + "/bindings")] +
-        ["/demos/" + s for s in os.listdir(loadgen_root + "/demos")] +
         ["/" + s for s in os.listdir(loadgen_root)])
     for fn in sorted(loadgen_files):
         full_fn = loadgen_root + fn