diff --git a/pkgs/applications/networking/cloudflared/default.nix b/pkgs/applications/networking/cloudflared/default.nix
index eea7abd62e64..68dd94b5ca99 100644
--- a/pkgs/applications/networking/cloudflared/default.nix
+++ b/pkgs/applications/networking/cloudflared/default.nix
@@ -79,5 +79,6 @@ buildGoModule rec {
     license = licenses.asl20;
     platforms = platforms.unix ++ platforms.windows;
     maintainers = with maintainers; [ bbigras enorris thoughtpolice piperswe ];
+    mainProgram = "cloudflared";
   };
 }
diff --git a/pkgs/applications/networking/davmail/default.nix b/pkgs/applications/networking/davmail/default.nix
index 5f5283738c06..3f6c52a4d473 100644
--- a/pkgs/applications/networking/davmail/default.nix
+++ b/pkgs/applications/networking/davmail/default.nix
@@ -57,5 +57,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ peterhoeg ];
     platforms = platforms.all;
+    mainProgram = "davmail";
   };
 }
diff --git a/pkgs/applications/networking/dropbox/default.nix b/pkgs/applications/networking/dropbox/default.nix
index 9a0b718293ab..cf2edf767316 100644
--- a/pkgs/applications/networking/dropbox/default.nix
+++ b/pkgs/applications/networking/dropbox/default.nix
@@ -86,5 +86,6 @@ buildFHSEnv {
     license     = licenses.unfree;
     maintainers = with maintainers; [ ttuegel ];
     platforms   = [ "i686-linux" "x86_64-linux" ];
+    mainProgram = "dropbox";
   };
 }