diff --git a/build/fbcode_builder/getdeps/builder.py b/build/fbcode_builder/getdeps/builder.py
index ba44e5913..43cea96de 100644
--- a/build/fbcode_builder/getdeps/builder.py
+++ b/build/fbcode_builder/getdeps/builder.py
@@ -173,19 +173,28 @@ class MakeBuilder(BuilderBase):
         self.install_args = install_args or []
         self.test_args = test_args
 
+    @property
+    def _make_binary(self):
+        return self.manifest.get("build", "make_binary", "make", ctx=self.ctx)
+
     def _get_prefix(self):
         return ["PREFIX=" + self.inst_dir, "prefix=" + self.inst_dir]
 
     def _build(self, install_dirs, reconfigure):
+
         env = self._compute_env(install_dirs)
 
         # Need to ensure that PREFIX is set prior to install because
         # libbpf uses it when generating its pkg-config file.
         # The lowercase prefix is used by some projects.
-        cmd = ["make", "-j%s" % self.num_jobs] + self.build_args + self._get_prefix()
+        cmd = (
+            [self._make_binary, "-j%s" % self.num_jobs]
+            + self.build_args
+            + self._get_prefix()
+        )
         self._run_cmd(cmd, env=env)
 
-        install_cmd = ["make"] + self.install_args + self._get_prefix()
+        install_cmd = [self._make_binary] + self.install_args + self._get_prefix()
         self._run_cmd(install_cmd, env=env)
 
     def run_tests(
@@ -196,7 +205,7 @@ class MakeBuilder(BuilderBase):
 
         env = self._compute_env(install_dirs)
 
-        cmd = ["make"] + self.test_args + self._get_prefix()
+        cmd = [self._make_binary] + self.test_args + self._get_prefix()
         self._run_cmd(cmd, env=env)
 
 
@@ -230,6 +239,10 @@ class AutoconfBuilder(BuilderBase):
         self.args = args or []
         self.conf_env_args = conf_env_args or {}
 
+    @property
+    def _make_binary(self):
+        return self.manifest.get("build", "make_binary", "make", ctx=self.ctx)
+
     def _build(self, install_dirs, reconfigure):
         configure_path = os.path.join(self.src_dir, "configure")
         autogen_path = os.path.join(self.src_dir, "autogen.sh")
@@ -264,8 +277,8 @@ class AutoconfBuilder(BuilderBase):
                 self._run_cmd(["autoreconf", "-ivf"], cwd=self.src_dir, env=env)
         configure_cmd = [configure_path, "--prefix=" + self.inst_dir] + self.args
         self._run_cmd(configure_cmd, env=env)
-        self._run_cmd(["make", "-j%s" % self.num_jobs], env=env)
-        self._run_cmd(["make", "install"], env=env)
+        self._run_cmd([self._make_binary, "-j%s" % self.num_jobs], env=env)
+        self._run_cmd([self._make_binary, "install"], env=env)
 
 
 class Iproute2Builder(BuilderBase):
diff --git a/build/fbcode_builder/getdeps/manifest.py b/build/fbcode_builder/getdeps/manifest.py
index 0228f77d0..2c43f86e1 100644
--- a/build/fbcode_builder/getdeps/manifest.py
+++ b/build/fbcode_builder/getdeps/manifest.py
@@ -63,6 +63,7 @@ SCHEMA = {
         "fields": {
             "builder": REQUIRED,
             "subdir": OPTIONAL,
+            "make_binary": OPTIONAL,
             "build_in_src_dir": OPTIONAL,
             "job_weight_mib": OPTIONAL,
         },
diff --git a/build/fbcode_builder/manifests/flex b/build/fbcode_builder/manifests/flex
index e09464943..2aa442f16 100644
--- a/build/fbcode_builder/manifests/flex
+++ b/build/fbcode_builder/manifests/flex
@@ -22,6 +22,10 @@ sha256 = 3dc27a16c21b717bcc5de8590b564d4392a0b8577170c058729d067d95ded825
 builder = autoconf
 subdir = flex-2.6.4
 
+[build.os=freebsd]
+builder = autoconf
+make_binary = gmake
+
 [build.os=windows]
 builder = nop