diff --git a/pkgs/development/compilers/llvm/3.8/llvm.nix b/pkgs/development/compilers/llvm/3.8/llvm.nix
index ca6723172d7..261a1d0f94c 100644
--- a/pkgs/development/compilers/llvm/3.8/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.8/llvm.nix
@@ -79,8 +79,8 @@ in stdenv.mkDerivation rec {
     "-DLLVM_ENABLE_RTTI=ON"
 
     "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
-    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.targetPlatform.config}"
-    "-DTARGET_TRIPLE=${stdenv.targetPlatform.config}"
+    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.hostPlatform.config}"
+    "-DTARGET_TRIPLE=${stdenv.hostPlatform.config}"
   ] ++ stdenv.lib.optional enableSharedLibraries [
     "-DLLVM_LINK_LLVM_DYLIB=ON"
   ] ++ stdenv.lib.optional (!isDarwin)
diff --git a/pkgs/development/compilers/llvm/3.9/llvm.nix b/pkgs/development/compilers/llvm/3.9/llvm.nix
index 678ec759425..6c935fd88de 100644
--- a/pkgs/development/compilers/llvm/3.9/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.9/llvm.nix
@@ -120,8 +120,8 @@ in stdenv.mkDerivation rec {
     "-DCOMPILER_RT_INCLUDE_TESTS=OFF" # FIXME: requires clang source code
 
     "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
-    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.targetPlatform.config}"
-    "-DTARGET_TRIPLE=${stdenv.targetPlatform.config}"
+    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.hostPlatform.config}"
+    "-DTARGET_TRIPLE=${stdenv.hostPlatform.config}"
   ] ++ stdenv.lib.optional enableSharedLibraries [
     "-DLLVM_LINK_LLVM_DYLIB=ON"
   ] ++ stdenv.lib.optional (!isDarwin)
diff --git a/pkgs/development/compilers/llvm/4/llvm.nix b/pkgs/development/compilers/llvm/4/llvm.nix
index aac9c4275ad..5cd7901fe22 100644
--- a/pkgs/development/compilers/llvm/4/llvm.nix
+++ b/pkgs/development/compilers/llvm/4/llvm.nix
@@ -100,8 +100,8 @@ in stdenv.mkDerivation (rec {
     "-DCOMPILER_RT_INCLUDE_TESTS=OFF" # FIXME: requires clang source code
 
     "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
-    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.targetPlatform.config}"
-    "-DTARGET_TRIPLE=${stdenv.targetPlatform.config}"
+    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.hostPlatform.config}"
+    "-DTARGET_TRIPLE=${stdenv.hostPlatform.config}"
   ]
   ++ stdenv.lib.optional enableSharedLibraries
     "-DLLVM_LINK_LLVM_DYLIB=ON"
diff --git a/pkgs/development/compilers/llvm/6/llvm.nix b/pkgs/development/compilers/llvm/6/llvm.nix
index f16f3f72137..16a716d32fa 100644
--- a/pkgs/development/compilers/llvm/6/llvm.nix
+++ b/pkgs/development/compilers/llvm/6/llvm.nix
@@ -94,7 +94,7 @@ in stdenv.mkDerivation (rec {
     "-DLLVM_ENABLE_FFI=ON"
     "-DLLVM_ENABLE_RTTI=ON"
     "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
-    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.targetPlatform.config}"
+    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.hostPlatform.config}"
     "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly"
     "-DLLVM_ENABLE_DUMP=ON"
   ] ++ optionals enableSharedLibraries [
diff --git a/pkgs/development/compilers/llvm/7/llvm.nix b/pkgs/development/compilers/llvm/7/llvm.nix
index fa5c48ec3ea..34f8a5478d1 100644
--- a/pkgs/development/compilers/llvm/7/llvm.nix
+++ b/pkgs/development/compilers/llvm/7/llvm.nix
@@ -106,7 +106,7 @@ in stdenv.mkDerivation (rec {
     "-DLLVM_ENABLE_FFI=ON"
     "-DLLVM_ENABLE_RTTI=ON"
     "-DLLVM_HOST_TRIPLE=${stdenv.hostPlatform.config}"
-    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.targetPlatform.config}"
+    "-DLLVM_DEFAULT_TARGET_TRIPLE=${stdenv.hostPlatform.config}"
     "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly"
     "-DLLVM_ENABLE_DUMP=ON"
   ] ++ optionals enableSharedLibraries [