diff --git a/compilers-overlay.nix b/compilers-overlay.nix
index a29b0c4..23bcf60 100644
--- a/compilers-overlay.nix
+++ b/compilers-overlay.nix
@@ -81,6 +81,7 @@ let
     clang5 = llvmPackages_5.clang or llvmPackages.clang;
     clang6 = llvmPackages_6.clang or llvmPackages.clang;
     clang7 = llvmPackages_7.clang or llvmPackages.clang;
+    clang12 = llvmPackages_12.clang or llvmPackages.clang;
     gcc = gcc;
     gcc6 = gcc6;
     gcc5 = gcc5;
diff --git a/release.nix b/release.nix
index aa9d68b..7b555ed 100644
--- a/release.nix
+++ b/release.nix
@@ -59,6 +59,7 @@ let
     "clang5"
     "clang6"
     "clang7"
+    "clang12"
     "gcc"
     "gcc6"
     "gcc5"