diff --git a/utils/GenLibDeps.pl b/utils/GenLibDeps.pl
index 42afa6a11fc..e283465ceda 100755
--- a/utils/GenLibDeps.pl
+++ b/utils/GenLibDeps.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
 # Program:  GenLibDeps.pl
 #
diff --git a/utils/codegen-diff b/utils/codegen-diff
index 2c3ac4c6dfa..16c6e956af5 100755
--- a/utils/codegen-diff
+++ b/utils/codegen-diff
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 use Getopt::Std;
 $DEBUG = 0;
diff --git a/utils/findsym.pl b/utils/findsym.pl
index 92346572fe0..f03e1231c25 100755
--- a/utils/findsym.pl
+++ b/utils/findsym.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 #
 # Program:  findsym.pl
 #
@@ -8,6 +8,8 @@
 # Syntax:   findsym.pl <directory_with_libraries_in_it> <symbol>
 #
 
+use warnings;
+
 # Give first option a name.
 my $Directory = $ARGV[0];
 my $Symbol = $ARGV[1];
diff --git a/utils/llvm-compilers-check b/utils/llvm-compilers-check
index 33331fd0b93..3b132454d20 100755
--- a/utils/llvm-compilers-check
+++ b/utils/llvm-compilers-check
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 ##===- utils/llvmbuild - Build the LLVM project ----------------*-python-*-===##
 #
 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
diff --git a/utils/llvm-native-gxx b/utils/llvm-native-gxx
index db547f654e2..3c8a703b5b6 100755
--- a/utils/llvm-native-gxx
+++ b/utils/llvm-native-gxx
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 # Wrapper around LLVM tools to generate a native .o from llvm-gxx using an
 # LLVM back-end (CBE by default).