diff --git a/llvm/TLI-musl.patch b/llvm/TLI-musl.patch
new file mode 100644
index 00000000..1a690808
--- /dev/null
+++ b/llvm/TLI-musl.patch
@@ -0,0 +1,35 @@
+From 5c571082fdaf61f6df19d9b7137dc26d71334058 Mon Sep 17 00:00:00 2001
+From: Natanael Copa <ncopa@alpinelinux.org>
+Date: Thu, 18 Feb 2016 10:33:04 +0100
+Subject: [PATCH 2/3] Fix build with musl libc
+
+On musl libc the fopen64 and fopen are the same thing, but for
+compatibility they have a `#define fopen64 fopen`. Same applies for
+fseek64, fstat64, fstatvfs64, ftello64, lstat64, stat64 and tmpfile64.
+---
+ include/llvm/Analysis/TargetLibraryInfo.h | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/include/llvm/Analysis/TargetLibraryInfo.h b/include/llvm/Analysis/TargetLibraryInfo.h
+index 7becdf0..7f14427 100644
+--- a/include/llvm/Analysis/TargetLibraryInfo.h
++++ b/include/llvm/Analysis/TargetLibraryInfo.h
+@@ -18,6 +18,15 @@
+ #include "llvm/IR/Module.h"
+ #include "llvm/Pass.h"
+ 
++#undef fopen64
++#undef fseeko64
++#undef fstat64
++#undef fstatvfs64
++#undef ftello64
++#undef lstat64
++#undef stat64
++#undef tmpfile64
++
+ namespace llvm {
+ /// VecDesc - Describes a possible vectorization of a function.
+ /// Function 'VectorFnName' is equivalent to 'ScalarFnName' vectorized
+-- 
+2.7.3
+
diff --git a/llvm/default.nix b/llvm/default.nix
index 36ed6ec2..c705fc29 100644
--- a/llvm/default.nix
+++ b/llvm/default.nix
@@ -85,7 +85,7 @@ in stdenv.mkDerivation (rec {
     rm unittests/IR/PassBuilderCallbacksTest.cpp
     rm test/tools/llvm-objcopy/ELF/mirror-permissions-unix.test
   '' + optionalString stdenv.hostPlatform.isMusl ''
-    patch -p1 -i ${../../TLI-musl.patch}
+    patch -p1 -i ${./TLI-musl.patch}
     substituteInPlace unittests/Support/CMakeLists.txt \
       --replace "add_subdirectory(DynamicLibrary)" ""
     rm unittests/Support/DynamicLibrary/DynamicLibraryTest.cpp