diff --git a/external/buildscripts/build_classlibs_osx.pl b/external/buildscripts/build_classlibs_osx.pl
index 59be0b70cf82f40074184613a8713345ac699191..e447cc39749f9e7486425210e8451aa44aa837b8 100644
--- a/external/buildscripts/build_classlibs_osx.pl
+++ b/external/buildscripts/build_classlibs_osx.pl
@@ -96,16 +96,16 @@ if (not $skipbuild)
 		my $autoconfVersion = "2.69";
 		my $automakeVersion = "1.15";
 		my $libtoolVersion = "2.4.6";
-		my $autoconfDir = "$externalBuildDeps/autoconf-$autoconfVersion";
-		my $automakeDir = "$externalBuildDeps/automake-$automakeVersion";
-		my $libtoolDir = "$externalBuildDeps/libtool-$libtoolVersion";
+		my $autoconfDir = "$externalBuildDeps/autoconf-2-69/autoconf-$autoconfVersion";
+		my $automakeDir = "$externalBuildDeps/automake-1-15/automake-$automakeVersion";
+		my $libtoolDir = "$externalBuildDeps/libtool-2-4-6/libtool-$libtoolVersion";
 		my $builtToolsDir = "$externalBuildDeps/built-tools";
 
 		$ENV{PATH} = "$builtToolsDir/bin:$ENV{PATH}";
 
 		if (!(-d "$autoconfDir"))
 		{
-			chdir("$externalBuildDeps") eq 1 or die ("failed to chdir to external directory\n");
+			chdir("$externalBuildDeps/autoconf-2-69") eq 1 or die ("failed to chdir to external directory\n");
 			system("tar xzf autoconf-$autoconfVersion.tar.gz") eq 0  or die ("failed to extract autoconf\n");
 
 			chdir("$autoconfDir") eq 1 or die ("failed to chdir to autoconf directory\n");
@@ -120,7 +120,7 @@ if (not $skipbuild)
 
 		if (!(-d "$automakeDir"))
 		{
-			chdir("$externalBuildDeps") eq 1 or die ("failed to chdir to external directory\n");
+			chdir("$externalBuildDeps/automake-1-15") eq 1 or die ("failed to chdir to external directory\n");
 			system("tar xzf automake-$automakeVersion.tar.gz") eq 0  or die ("failed to extract automake\n");
 
 			chdir("$automakeDir") eq 1 or die ("failed to chdir to automake directory\n");
@@ -136,7 +136,7 @@ if (not $skipbuild)
 
 		if (!(-d "$libtoolDir"))
 		{
-			chdir("$externalBuildDeps") eq 1 or die ("failed to chdir to external directory\n");
+			chdir("$externalBuildDeps/libtool-2-4-6") eq 1 or die ("failed to chdir to external directory\n");
 			system("tar xzf libtool-$libtoolVersion.tar.gz") eq 0  or die ("failed to extract libtool\n");
 		
 			chdir("$libtoolDir") eq 1 or die ("failed to chdir to libtool directory\n");
diff --git a/external/buildscripts/build_runtime_osx.pl b/external/buildscripts/build_runtime_osx.pl
index e4a22b31a5d4ae6df11ba1bd91dd759dc5dc1e17..e4f6bfeada842293086203261c2c69641d5a936a 100644
--- a/external/buildscripts/build_runtime_osx.pl
+++ b/external/buildscripts/build_runtime_osx.pl
@@ -64,9 +64,9 @@ if ($externalBuildDeps ne "")
 	my $autoconfVersion = "2.69";
 	my $automakeVersion = "1.15";
 	my $libtoolVersion = "2.4.6";
-	my $autoconfDir = "$externalBuildDeps/autoconf-$autoconfVersion";
-	my $automakeDir = "$externalBuildDeps/automake-$automakeVersion";
-	my $libtoolDir = "$externalBuildDeps/libtool-$libtoolVersion";
+	my $autoconfDir = "$externalBuildDeps/autoconf-2-69/autoconf-$autoconfVersion";
+	my $automakeDir = "$externalBuildDeps/automake-1-15/automake-$automakeVersion";
+	my $libtoolDir = "$externalBuildDeps/libtool-2-4-6/libtool-$libtoolVersion";
 
 	my $builtToolsDir = "$externalBuildDeps/built-tools";
 
@@ -74,7 +74,7 @@ if ($externalBuildDeps ne "")
 
 	if (!(-d "$autoconfDir"))
 	{
-		chdir("$externalBuildDeps") eq 1 or die ("failed to chdir to external directory\n");
+		chdir("$externalBuildDeps/autoconf-2-69") eq 1 or die ("failed to chdir to external directory\n");
 		system("tar xzf autoconf-$autoconfVersion.tar.gz") eq 0  or die ("failed to extract autoconf\n");
 
 		chdir("$autoconfDir") eq 1 or die ("failed to chdir to autoconf directory\n");
@@ -89,7 +89,7 @@ if ($externalBuildDeps ne "")
 
 	if (!(-d "$automakeDir"))
 	{
-		chdir("$externalBuildDeps") eq 1 or die ("failed to chdir to external directory\n");
+		chdir("$externalBuildDeps/automake-1-15") eq 1 or die ("failed to chdir to external directory\n");
 		system("tar xzf automake-$automakeVersion.tar.gz") eq 0  or die ("failed to extract automake\n");
 
 		chdir("$automakeDir") eq 1 or die ("failed to chdir to automake directory\n");
@@ -104,7 +104,7 @@ if ($externalBuildDeps ne "")
 
 	if (!(-d "$libtoolDir"))
 	{
-		chdir("$externalBuildDeps") eq 1 or die ("failed to chdir to external directory\n");
+		chdir("$externalBuildDeps/libtool-2-4-6") eq 1 or die ("failed to chdir to external directory\n");
 		system("tar xzf libtool-$libtoolVersion.tar.gz") eq 0  or die ("failed to extract libtool\n");
 	
 		chdir("$libtoolDir") eq 1 or die ("failed to chdir to libtool directory\n");
diff --git a/external/buildscripts/prepare_osx_build.pl b/external/buildscripts/prepare_osx_build.pl
index 7fdbd660ac0f0a35244ff99efb3f1ea83a84d699..668137008bc58639c97ae487cdc9a1da62cd141e 100644
--- a/external/buildscripts/prepare_osx_build.pl
+++ b/external/buildscripts/prepare_osx_build.pl
@@ -10,9 +10,9 @@ if ($externalBuildDeps ne "")
 	my $autoconfVersion = "2.69";
 	my $automakeVersion = "1.15";
 	my $libtoolVersion = "2.4.6";
-	my $autoconfDir = "$externalBuildDeps/autoconf-$autoconfVersion";
-	my $automakeDir = "$externalBuildDeps/automake-$automakeVersion";
-	my $libtoolDir = "$externalBuildDeps/libtool-$libtoolVersion";
+	my $autoconfDir = "$externalBuildDeps/autoconf-2-69/autoconf-$autoconfVersion";
+	my $automakeDir = "$externalBuildDeps/automake-1-15/automake-$automakeVersion";
+	my $libtoolDir = "$externalBuildDeps/libtool-2-4-6/libtool-$libtoolVersion";
 
 	my $builtToolsDir = "$externalBuildDeps/built-tools";
 
@@ -20,7 +20,7 @@ if ($externalBuildDeps ne "")
 
 	if (!(-d "$autoconfDir"))
 	{
-		chdir("$externalBuildDeps") eq 1 or die ("failed to chdir to external directory\n");
+		chdir("$externalBuildDeps/autoconf-2-69") eq 1 or die ("failed to chdir to external directory\n");
 		system("tar xzf autoconf-$autoconfVersion.tar.gz") eq 0  or die ("failed to extract autoconf\n");
 
 		chdir("$autoconfDir") eq 1 or die ("failed to chdir to autoconf directory\n");
@@ -35,7 +35,7 @@ if ($externalBuildDeps ne "")
 
 	if (!(-d "$automakeDir"))
 	{
-		chdir("$externalBuildDeps") eq 1 or die ("failed to chdir to external directory\n");
+		chdir("$externalBuildDeps/automake-1-15") eq 1 or die ("failed to chdir to external directory\n");
 		system("tar xzf automake-$automakeVersion.tar.gz") eq 0  or die ("failed to extract automake\n");
 
 		chdir("$automakeDir") eq 1 or die ("failed to chdir to automake directory\n");
@@ -50,7 +50,7 @@ if ($externalBuildDeps ne "")
 
 	if (!(-d "$libtoolDir"))
 	{
-		chdir("$externalBuildDeps") eq 1 or die ("failed to chdir to external directory\n");
+		chdir("$externalBuildDeps/libtool-2-4-6") eq 1 or die ("failed to chdir to external directory\n");
 		system("tar xzf libtool-$libtoolVersion.tar.gz") eq 0  or die ("failed to extract libtool\n");
 	
 		chdir("$libtoolDir") eq 1 or die ("failed to chdir to libtool directory\n");