diff --git a/pkgs/by-name/fl/flow/gcc-15-compat.patch b/pkgs/by-name/fl/flow/gcc-15-compat.patch
new file mode 100644
index 000000000000..670e4ac0a4cf
--- /dev/null
+++ b/pkgs/by-name/fl/flow/gcc-15-compat.patch
@@ -0,0 +1,12 @@
+diff --git a/src/third-party/fuzzy-path/vendor/MatcherBase.h b/src/third-party/fuzzy-path/vendor/MatcherBase.h
+index fbaabc3d92..57c0c58fb2 100644
+--- a/src/third-party/fuzzy-path/vendor/MatcherBase.h
++++ b/src/third-party/fuzzy-path/vendor/MatcherBase.h
+@@ -1,6 +1,7 @@
+ #pragma once
+ 
+ #include <memory>
++#include <cstdint>
+ #include <string>
+ #include <unordered_map>
+ #include <vector>
diff --git a/pkgs/by-name/fl/flow/package.nix b/pkgs/by-name/fl/flow/package.nix
index ddd421d71fdc..2ba10797e23c 100644
--- a/pkgs/by-name/fl/flow/package.nix
+++ b/pkgs/by-name/fl/flow/package.nix
@@ -25,6 +25,11 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-Mqx07dJAYIesp09RmKr74rLKRkG46nHQERhuQ7AyAiM=";
   };
 
+  patches = [
+    # error: 'uint64_t' does not name a type
+    ./gcc-15-compat.patch
+  ];
+
   makeFlags = [ "FLOW_RELEASE=1" ];
 
   strictDeps = true;