diff --git a/pkgs/applications/audio/mpc/default.nix b/pkgs/applications/audio/mpc/default.nix
index cebf08f19084..9f7d8a06e206 100644
--- a/pkgs/applications/audio/mpc/default.nix
+++ b/pkgs/applications/audio/mpc/default.nix
@@ -58,5 +58,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ AndersonTorres ];
     platforms = with platforms; unix;
+    mainProgram = "mpc";
   };
 }
diff --git a/pkgs/development/tools/jq/default.nix b/pkgs/development/tools/jq/default.nix
index 9c3d3c09ea5f..3c6d85e8ddcc 100644
--- a/pkgs/development/tools/jq/default.nix
+++ b/pkgs/development/tools/jq/default.nix
@@ -76,5 +76,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ raskin globin artturin ];
     platforms = platforms.unix;
     downloadPage = "https://stedolan.github.io/jq/download/";
+    mainProgram = "jq";
   };
 }
diff --git a/pkgs/misc/brightnessctl/default.nix b/pkgs/misc/brightnessctl/default.nix
index 2fab8b4bd676..43a37ad764ee 100644
--- a/pkgs/misc/brightnessctl/default.nix
+++ b/pkgs/misc/brightnessctl/default.nix
@@ -22,6 +22,7 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ megheaiulian ];
     platforms = platforms.linux;
+    mainProgram = "brightnessctl";
   };
 
 }
diff --git a/pkgs/tools/wayland/gtklock/default.nix b/pkgs/tools/wayland/gtklock/default.nix
index 3d74344a4e76..c5146532e442 100644
--- a/pkgs/tools/wayland/gtklock/default.nix
+++ b/pkgs/tools/wayland/gtklock/default.nix
@@ -52,5 +52,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3;
     maintainers = with maintainers; [ dit7ya ];
     platforms = platforms.linux;
+    mainProgram = "gtklock";
   };
 }
diff --git a/pkgs/tools/wayland/wlogout/default.nix b/pkgs/tools/wayland/wlogout/default.nix
index de150c3af309..2be33bee6ac0 100644
--- a/pkgs/tools/wayland/wlogout/default.nix
+++ b/pkgs/tools/wayland/wlogout/default.nix
@@ -59,6 +59,7 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ AndersonTorres ];
     platforms = platforms.linux;
+    mainProgram = "wlogout";
   };
 }
 # TODO: shell completions