diff -up ./setup.py.bak ./setup.py
--- ./setup.py.bak	2019-01-19 22:52:55.000000000 +0100
+++ ./setup.py	2019-02-15 15:29:46.960976879 +0100
@@ -367,11 +367,13 @@ ext_modules = [
         include_dirs=['src/'],
         sources=["src/CAST.c"]),
     Extension("Crypto.Cipher._raw_des",
-        include_dirs=['src/', 'src/libtom/'],
-        sources=["src/DES.c"]),
+        include_dirs=['src/'],
+        sources=["src/DES.c"],
+        extra_link_args=["-ltomcrypt"]),
     Extension("Crypto.Cipher._raw_des3",
-        include_dirs=['src/', 'src/libtom/'],
-        sources=["src/DES3.c"]),
+        include_dirs=['src/'],
+        sources=["src/DES3.c"],
+        extra_link_args=["-ltomcrypt"]),
     Extension("Crypto.Util._cpuid_c",
         include_dirs=['src/'],
         sources=['src/cpuid.c']),
@@ -400,8 +402,9 @@ ext_modules = [
         include_dirs=['src/'],
         sources=["src/ARC4.c"]),
     Extension("Crypto.Cipher._Salsa20",
-        include_dirs=['src/', 'src/libtom/'],
-        sources=["src/Salsa20.c"]),
+        include_dirs=['src/'],
+        sources=["src/Salsa20.c"],
+        extra_link_args=["-ltomcrypt"]),
     Extension("Crypto.Cipher._chacha20",
         include_dirs=['src/'],
         sources=["src/chacha20.c"]),
diff -up ./src/DES.c.bak ./src/DES.c
--- ./src/DES.c.bak	2019-01-19 22:52:55.000000000 +0100
+++ ./src/DES.c	2019-02-15 15:30:27.014967034 +0100
@@ -39,7 +39,7 @@ FAKE_INIT(raw_des3)
 
 /* Include the actial DES implementation */
 #define LTC_NO_PROTOTYPES
-#include "libtom/tomcrypt_des.c"
+#include <tomcrypt.h>
 
 struct block_state {
     symmetric_key sk;