diff --git a/pkgs/development/lisp-modules-new/lisp-packages.nix b/pkgs/development/lisp-modules-new/lisp-packages.nix
index 513f72a985e0..913296e9fce3 100644
--- a/pkgs/development/lisp-modules-new/lisp-packages.nix
+++ b/pkgs/development/lisp-modules-new/lisp-packages.nix
@@ -133,10 +133,6 @@ let
     in stdenv.mkDerivation (rec {
       inherit pname version nativeLibs javaLibs lispLibs lisp systems asds;
 
-      src = if builtins.length patches > 0
-            then apply-patches args
-            else args.src;
-
       # When src is null, we are building a lispWithPackages and only
       # want to make use of the dependency environment variables
       # generated by build-asdf-system
@@ -248,24 +244,12 @@ let
       dontStrip = true;
       dontFixup = true;
 
-    } // args));
-
-  # Need to do that because we always want to compile straight from
-  # `src` for go-to-definition to work in SLIME.
-  apply-patches = { patches, src, ... }:
-    stdenv.mkDerivation {
-      inherit patches src;
-      pname = "source";
-      version = "patched";
-      dontConfigure = true;
-      dontBuild = true;
-      dontStrip = true;
-      dontFixup = true;
-      installPhase = ''
-        mkdir -pv $out
-        cp -r * $out
-      '';
-    };
+    } // (args // {
+      src = if builtins.length (args.patches or []) > 0
+            then pkgs.applyPatches { inherit (args) src patches; }
+            else args.src;
+      patches = [];
+    })));
 
   # Build the set of lisp packages using `lisp`
   # These packages are defined manually for one reason or another:
diff --git a/pkgs/development/lisp-modules-new/packages.nix b/pkgs/development/lisp-modules-new/packages.nix
index 3dee2b19231b..244d2f4b5b5f 100644
--- a/pkgs/development/lisp-modules-new/packages.nix
+++ b/pkgs/development/lisp-modules-new/packages.nix
@@ -102,6 +102,7 @@ let
       url = "https://github.com/cffi/cffi/archive/3f842b92ef808900bf20dae92c2d74232c2f6d3a.tar.gz";
       sha256 = "1jilvmbbfrmb23j07lwmkbffc6r35wnvas5s4zjc84i856ccclm2";
     };
+    patches = [ ./patches/cffi-libffi-darwin-ffi-h.patch ];
   });
 
   cl-unicode = build-with-compile-into-pwd {
diff --git a/pkgs/development/lisp-modules-new/patches/cffi-libffi-darwin-ffi-h.patch b/pkgs/development/lisp-modules-new/patches/cffi-libffi-darwin-ffi-h.patch
new file mode 100644
index 000000000000..15c4a4588755
--- /dev/null
+++ b/pkgs/development/lisp-modules-new/patches/cffi-libffi-darwin-ffi-h.patch
@@ -0,0 +1,14 @@
+--- a/libffi/libffi-types.lisp
++++ b/libffi/libffi-types.lisp
+@@ -43,9 +43,6 @@
+ 
+ (pkg-config-cflags "libffi" :optional t)
+ 
+-#+darwin
+-(include "ffi/ffi.h")
+-#-darwin
+ (include "ffi.h")
+ 
+ (cenum status
+
+Diff finished.  Sun Nov 13 00:23:10 2022
\ No newline at end of file