diff --git a/infra/build/functions/build_project.py b/infra/build/functions/build_project.py
index e865f2852..78cc42d4c 100755
--- a/infra/build/functions/build_project.py
+++ b/infra/build/functions/build_project.py
@@ -305,7 +305,11 @@ def get_id(step_type, build):
 
 
 def get_build_steps(  # pylint: disable=too-many-locals, too-many-statements, too-many-branches, too-many-arguments
-    project_name, project_yaml, dockerfile, config):
+    project_name,
+    project_yaml,
+    dockerfile,
+    config,
+    additional_env=None):
   """Returns build steps for project."""
 
   project = Project(project_name, project_yaml, dockerfile)
@@ -336,6 +340,9 @@ def get_build_steps(  # pylint: disable=too-many-locals, too-many-statements, to
           continue
 
         env = get_env(project.fuzzing_language, build)
+        if additional_env:
+          env.extend(additional_env)
+
         compile_step = get_compile_step(project, build, env, config.parallel,
                                         config.upload_build_logs)
         build_steps.append(compile_step)
diff --git a/infra/build/functions/target_experiment.py b/infra/build/functions/target_experiment.py
index 8870e6177..902ef1cd5 100644
--- a/infra/build/functions/target_experiment.py
+++ b/infra/build/functions/target_experiment.py
@@ -25,6 +25,8 @@ import google.auth
 import build_lib
 import build_project
 
+JCC_DIR = '/usr/local/bin/jcc'
+
 
 def run_experiment(project_name, target_name, args, output_path,
                    build_output_path, upload_corpus_path, upload_coverage_path,
@@ -58,8 +60,15 @@ def run_experiment(project_name, target_name, args, output_path,
   # Don't do bad build checks.
   project_yaml['run_tests'] = False
 
-  steps = build_project.get_build_steps(project_name, project_yaml,
-                                        dockerfile_contents, config)
+  jcc_env = [
+      f'CC={JCC_DIR}/clang',
+      f'CXX={JCC_DIR}/clang++',
+  ]
+  steps = build_project.get_build_steps(project_name,
+                                        project_yaml,
+                                        dockerfile_contents,
+                                        config,
+                                        additional_env=jcc_env)
 
   build = build_project.Build('libfuzzer', 'address', 'x86_64')
   local_output_path = '/workspace/output.log'
@@ -109,6 +118,7 @@ def run_experiment(project_name, target_name, args, output_path,
   # Build for coverage.
   build = build_project.Build('libfuzzer', 'coverage', 'x86_64')
   env = build_project.get_env(project_yaml['language'], build)
+  env.extend(jcc_env)
 
   steps.append(
       build_project.get_compile_step(project, build, env, config.parallel))