diff --git a/pkgs/applications/networking/mailreaders/evolution/evolution/default.nix b/pkgs/applications/networking/mailreaders/evolution/evolution/default.nix
index 8b1b9a3a83c5..1459a12b3712 100644
--- a/pkgs/applications/networking/mailreaders/evolution/evolution/default.nix
+++ b/pkgs/applications/networking/mailreaders/evolution/evolution/default.nix
@@ -144,8 +144,10 @@ stdenv.mkDerivation rec {
     };
   };
 
-  PKG_CONFIG_CAMEL_1_2_CAMEL_PROVIDERDIR = "${placeholder "out"}/lib/evolution-data-server/camel-providers";
-  PKG_CONFIG_LIBEDATASERVERUI_1_2_UIMODULEDIR = "${placeholder "out"}/lib/evolution-data-server/ui-modules";
+  env = {
+    PKG_CONFIG_CAMEL_1_2_CAMEL_PROVIDERDIR = "${placeholder "out"}/lib/evolution-data-server/camel-providers";
+    PKG_CONFIG_LIBEDATASERVERUI_1_2_UIMODULEDIR = "${placeholder "out"}/lib/evolution-data-server/ui-modules";
+  };
 
   meta = {
     homepage = "https://gitlab.gnome.org/GNOME/evolution";