Removing toolchain_dir variable
diff --git a/toolchain/BUILD b/toolchain/BUILD
index 780412a..243809f 100644
--- a/toolchain/BUILD
+++ b/toolchain/BUILD
@@ -48,8 +48,6 @@
     target_cpu = "aarch64",
     target_full_name = "aarch64-linux-gnu",
     toolchain_name = "linux_aarch_64",
-    # Don't really need this, setting it because it's required.
-    toolchain_dir = "/opt/manylinux/2014/aarch64",
 )
 
 cc_toolchain_config(
@@ -60,7 +58,6 @@
     sysroot = "/opt/manylinux/2014/ppc64le",
     target_cpu = "ppc64",
     target_full_name = "powerpc64le-linux-gnu",
-    toolchain_dir = "/opt/manylinux/2014/ppc64le",
     toolchain_name = "linux_ppcle_64",
 )
 
@@ -72,7 +69,6 @@
     sysroot = "/opt/manylinux/2014/s390x",
     target_cpu = "systemz",
     target_full_name = "s390x-linux-gnu",
-    toolchain_dir = "/opt/manylinux/2014/s390x",
     toolchain_name = "linux_s390_64",
 )
 
@@ -84,7 +80,6 @@
     sysroot = "/opt/manylinux/2014/i686",
     target_cpu = "x86_32",
     target_full_name = "i386-linux-gnu",
-    toolchain_dir = "/opt/manylinux/2014/i686",
     toolchain_name = "linux_x86_32",
 )
 
@@ -96,7 +91,6 @@
     sysroot = "/opt/manylinux/2014/x86_64",
     target_cpu = "x86_64",
     target_full_name = "x86_64-linux-gnu",
-    toolchain_dir = "/opt/manylinux/2014/x86_64",
     toolchain_name = "linux_x86_64",
 )
 
@@ -113,7 +107,6 @@
     sysroot = "/usr/tools/apple_sdks/xcode_13_0/macosx",
     target_cpu = "aarch64",
     target_full_name = "aarch64-apple-macosx11.3",
-    toolchain_dir = "/usr/tools/apple_sdks/xcode_13_0/macosx",
     toolchain_name = "osx_aarch_64",
 )
 
@@ -130,7 +123,6 @@
     sysroot = "/usr/tools/apple_sdks/xcode_13_0/macosx",
     target_cpu = "x86_64",
     target_full_name = "x86_64-apple-macosx11.3",
-    toolchain_dir = "/usr/tools/apple_sdks/xcode_13_0/macosx",
     toolchain_name = "osx_x86_64",
 )
 
@@ -143,15 +135,15 @@
         "-isystem/usr/lib/gcc/i686-w64-mingw32/8.3-posix/include/c++/i686-w64-mingw32",
         "-fsjlj-exceptions",
     ],
-    extra_include = "/usr/lib/gcc/i686-w64-mingw32/8.3-posix/include",
+    extra_include = "/usr/lib/gcc/i686-w64-mingw32",
     extra_linker_flags = [
         "-L/usr/lib/gcc/i686-w64-mingw32/8.3-posix",
         "-pthread",
     ],
     linker_path = "/usr/bin/ld",
+    sysroot = "/usr/i686-w64-mingw32",
     target_cpu = "x86_32",
     target_full_name = "i686-w64-mingw32",
-    toolchain_dir = "/usr/i686-w64-mingw32/include",
     toolchain_name = "i686-w64-mingw32",
 )
 
@@ -168,8 +160,8 @@
         "-L/usr/lib/gcc/x86_64-w64-mingw32/8.3-posix",
     ],
     linker_path = "/usr/bin/ld",
+    sysroot = "/usr/x86_64-w64-mingw32",
     target_cpu = "x86_64",
     target_full_name = "x86_64-w64-mingw32",
-    toolchain_dir = "/usr/x86_64-w64-mingw32/include",
     toolchain_name = "x86_64-w64-mingw32",
 )