diff --git a/pkgs/by-name/fn/fna3d/package.nix b/pkgs/by-name/fn/fna3d/package.nix
index 08862d304a6f..162210bbccd4 100644
--- a/pkgs/by-name/fn/fna3d/package.nix
+++ b/pkgs/by-name/fn/fna3d/package.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     homepage = "https://fna-xna.github.io/";
     license = lib.licenses.mspl;
     platforms = lib.platforms.linux;
-    mainProgram = pname;
+    mainProgram = "fna3d";
     maintainers = with lib.maintainers; [ mrtnvgr ];
   };
 }
diff --git a/pkgs/by-name/r1/r10k/package.nix b/pkgs/by-name/r1/r10k/package.nix
index 529c1709861b..5973b9cb5365 100644
--- a/pkgs/by-name/r1/r10k/package.nix
+++ b/pkgs/by-name/r1/r10k/package.nix
@@ -47,6 +47,6 @@ bundlerApp rec {
       anthonyroussel
     ];
     platforms = lib.platforms.unix;
-    mainProgram = pname;
+    mainProgram = "r10k";
   };
 }
diff --git a/pkgs/by-name/xp/xpipe/package.nix b/pkgs/by-name/xp/xpipe/package.nix
index 2cb64a2a9517..0d9e943c37c7 100644
--- a/pkgs/by-name/xp/xpipe/package.nix
+++ b/pkgs/by-name/xp/xpipe/package.nix
@@ -153,6 +153,6 @@ stdenvNoCC.mkDerivation rec {
     ];
     maintainers = with lib.maintainers; [ crschnick ];
     platforms = [ "x86_64-linux" ];
-    mainProgram = pname;
+    mainProgram = "xpipe";
   };
 }