diff --git a/sample-code/fib.cl b/sample-code/fib.cl
old mode 100644
new mode 100755
index 6fba537..7853f5c
--- a/sample-code/fib.cl
+++ b/sample-code/fib.cl
@@ -1,3 +1,4 @@
+#!/usr/bin/env -S conlang -r false
 // Calculate Fibonacci numbers
 
 fn main() {
diff --git a/sample-code/fizzbuzz.cl b/sample-code/fizzbuzz.cl
old mode 100644
new mode 100755
index 364018b..7317726
--- a/sample-code/fizzbuzz.cl
+++ b/sample-code/fizzbuzz.cl
@@ -1,7 +1,8 @@
+#!/usr/bin/env -S conlang -r false
 // FizzBuzz, using the unstable variadic-`print` builtin
 
 fn main() {
-    fizzbuzz(10, 20)
+    fizzbuzz(0, 30)
 }
 
 // Outputs FizzBuzz for numbers between `start` and `end`, inclusive
diff --git a/sample-code/hello.cl b/sample-code/hello.cl
old mode 100644
new mode 100755
index 792362e..d143759
--- a/sample-code/hello.cl
+++ b/sample-code/hello.cl
@@ -1,3 +1,6 @@
+#!/usr/bin/env -S conlang -r false
+//! Prints "Hello, world!"
+
 fn main() {
     println("Hello, world!")
 }