diff --git a/pkgs/development/python-modules/floret/cstdint.patch b/pkgs/development/python-modules/floret/cstdint.patch
new file mode 100644
index 000000000000..f30f557cb701
--- /dev/null
+++ b/pkgs/development/python-modules/floret/cstdint.patch
@@ -0,0 +1,12 @@
+diff --git a/src/args.cc b/src/args.cc
+index a8975e81624c..99854c919341 100644
+--- a/src/args.cc
++++ b/src/args.cc
+@@ -10,6 +10,7 @@
+ 
+ #include <stdlib.h>
+ 
++#include <cstdint>
+ #include <iostream>
+ #include <stdexcept>
+ #include <string>
diff --git a/pkgs/development/python-modules/floret/default.nix b/pkgs/development/python-modules/floret/default.nix
index 72248cf8dbaa..6ca020ac81df 100644
--- a/pkgs/development/python-modules/floret/default.nix
+++ b/pkgs/development/python-modules/floret/default.nix
@@ -23,6 +23,8 @@ buildPythonPackage rec {
     hash = "sha256-7vkw6H0ZQoHEwNusY6QWh/vPbSCdP1ZaaqABHsZH6hQ=";
   };
 
+  patches = [./cstdint.patch ];
+
   nativeBuildInputs = [
     pybind11
     setuptools