kitty: patch paths to linux-specific libs on linux builds only

pkgs/applications/misc/kitty/default.nix

@@ -64,8 +64,10 @@ buildPythonApplication rec {
   outputs = [ "out" "terminfo" ];
 
   patches = [
+    ./fix-paths.patch
+  ] ++ stdenv.lib.optionals stdenv.isLinux [
     (substituteAll {
-      src = ./fix-paths.patch;
+      src = ./library-paths.patch;
       libstartup_notification = "${libstartup_notification}/lib/libstartup-notification-1.so";
       libcanberra = "${libcanberra}/lib/libcanberra.so";
     })

pkgs/applications/misc/kitty/fix-paths.patch

@@ -1,24 +1,3 @@
---- a/kitty/desktop.c
-+++ b/kitty/desktop.c
-@@ -30,7 +30,7 @@
- static PyObject*
- init_x11_startup_notification(PyObject UNUSED *self, PyObject *args) {
-     static bool done = false;
--    static const char* libname = "libstartup-notification-1.so";
-+    static const char* libname = "@libstartup_notification@";
-     // some installs are missing the .so symlink, so try the full name
-     static const char* libname2 = "libstartup-notification-1.so.0";
-     static const char* libname3 = "libstartup-notification-1.so.0.0.0";
-@@ -105,7 +105,7 @@ load_libcanberra_functions(void) {
- 
- static void
- load_libcanberra(void) {
--    static const char* libname = "libcanberra.so";
-+    static const char* libname = "@libcanberra@";
-     // some installs are missing the .so symlink, so try the full name
-     static const char* libname2 = "libcanberra.so.0";
-     static const char* libname3 = "libcanberra.so.0.2.5";
-
 --- a/docs/Makefile
 +++ b/docs/Makefile
 @@ -3,7 +3,7 @@

pkgs/applications/misc/kitty/library-paths.patch

@@ -0,0 +1,20 @@
+--- a/kitty/desktop.c
++++ b/kitty/desktop.c
+@@ -30,7 +30,7 @@
+ static PyObject*
+ init_x11_startup_notification(PyObject UNUSED *self, PyObject *args) {
+     static bool done = false;
+-    static const char* libname = "libstartup-notification-1.so";
++    static const char* libname = "@libstartup_notification@";
+     // some installs are missing the .so symlink, so try the full name
+     static const char* libname2 = "libstartup-notification-1.so.0";
+     static const char* libname3 = "libstartup-notification-1.so.0.0.0";
+@@ -105,7 +105,7 @@ load_libcanberra_functions(void) {
+ 
+ static void
+ load_libcanberra(void) {
+-    static const char* libname = "libcanberra.so";
++    static const char* libname = "@libcanberra@";
+     // some installs are missing the .so symlink, so try the full name
+     static const char* libname2 = "libcanberra.so.0";
+     static const char* libname3 = "libcanberra.so.0.2.5";