vips: fix build on FreeBSD

This dependency doesn't work on Darwin and it doesn't work on FreeBSD
either.

Author: rhelmot

pkgs/by-name/vi/vips/package.nix

@@ -61,7 +61,7 @@ stdenv.mkDerivation (finalAttrs: {
     "out"
     "man"
     "dev"
-  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ "devdoc" ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isFreeBSD) [ "devdoc" ];
 
   src = fetchFromGitHub {
     owner = "libvips";
@@ -83,7 +83,7 @@ stdenv.mkDerivation (finalAttrs: {
       ninja
       pkg-config
     ]
-    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isFreeBSD) [
       gtk-doc
     ];
 
@@ -134,7 +134,9 @@ stdenv.mkDerivation (finalAttrs: {
       (lib.mesonEnable "nifti" false)
       (lib.mesonEnable "introspection" withIntrospection)
     ]
-    ++ lib.optional (!stdenv.hostPlatform.isDarwin) (lib.mesonBool "gtk_doc" true)
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isFreeBSD) (
+      lib.mesonBool "gtk_doc" true
+    )
     ++ lib.optional (imagemagick == null) (lib.mesonEnable "magick" false);
 
   passthru = {