diff --git a/pills/20/three-hellos.nix b/pills/20/three-hellos.nix
index e103caf..cc9545b 100644
--- a/pills/20/three-hellos.nix
+++ b/pills/20/three-hellos.nix
@@ -36,6 +36,7 @@ let
       mkdir -p "$out/bin"
       echo "#! ${stdenv.shell}" >> "$out/bin/hello"
       echo "exec $(which hello)" >> "$out/bin/hello"
+      chmod 0755 "$out/bin/hello"
     '';
   };
 
diff --git a/pills/20/two-hellos.nix b/pills/20/two-hellos.nix
index d660fc6..f1e7c97 100644
--- a/pills/20/two-hellos.nix
+++ b/pills/20/two-hellos.nix
@@ -24,6 +24,7 @@ let
       mkdir -p "$out/bin"
       echo "#! ${stdenv.shell}" >> "$out/bin/hello"
       echo "exec $(which hello)" >> "$out/bin/hello"
+      chmod 0755 "$out/bin/hello"
     '';
   };