diff --git a/src/conditions/BUILD.tools b/src/conditions/BUILD.tools
index 3854877..ed90895 100644
--- a/src/conditions/BUILD.tools
+++ b/src/conditions/BUILD.tools
@@ -1,72 +1,103 @@
 config_setting(
     name = "freebsd",
-    constraint_values = [ "@platforms//os:freebsd"],
+    constraint_values = ["@platforms//os:freebsd"],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "openbsd",
-    constraint_values = [ "@platforms//os:openbsd"],
+    constraint_values = ["@platforms//os:openbsd"],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "darwin",
-    constraint_values = [ "@platforms//os:macos" ],
+    constraint_values = ["@platforms//os:macos"],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "linux_ppc",
-    constraint_values = [ "@platforms//os:linux", "@platforms//cpu:ppc" ],
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:ppc",
+    ],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "linux_ppc64le",
-    constraint_values = [ "@platforms//os:linux", "@platforms//cpu:ppc" ],
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:ppc",
+    ],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "linux_s390x",
-    constraint_values = [ "@platforms//os:linux", "@platforms//cpu:s390x" ],
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:s390x",
+    ],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "linux_x86_64",
-    constraint_values = [ "@platforms//os:linux", "@platforms//cpu:x86_64" ],
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:x86_64",
+    ],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "linux_aarch64",
-    constraint_values = [ "@platforms//os:linux", "@platforms//cpu:aarch64" ],
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:aarch64",
+    ],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "darwin_x86_64",
-    constraint_values = [ "@platforms//os:macos", "@platforms//cpu:x86_64" ],
+    constraint_values = [
+        "@platforms//os:macos",
+        "@platforms//cpu:x86_64",
+    ],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "darwin_arm64",
-    constraint_values = [ "@platforms//os:macos", "@platforms//cpu:arm64" ],
+    constraint_values = [
+        "@platforms//os:macos",
+        "@platforms//cpu:arm64",
+    ],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "darwin_arm64e",
-    constraint_values = [ "@platforms//os:macos", "@platforms//cpu:arm64e" ],
+    constraint_values = [
+        "@platforms//os:macos",
+        "@platforms//cpu:arm64e",
+    ],
     visibility = ["//visibility:public"],
 )
 
 config_setting(
     name = "windows",
-    constraint_values = [ "@platforms//os:windows"],
+    constraint_values = ["@platforms//os:windows"],
+    visibility = ["//visibility:public"],
+)
+
+# TODO: figure out how to base this selection on constraints
+config_setting(
+    name = "windows_msvc",
+    values = {"cpu": "x64_windows_msvc"},
     visibility = ["//visibility:public"],
 )