diff --git a/pkgs/development/compilers/llvm/12/bintools.nix b/pkgs/development/compilers/llvm/12/bintools/default.nix
similarity index 100%
rename from pkgs/development/compilers/llvm/12/bintools.nix
rename to pkgs/development/compilers/llvm/12/bintools/default.nix
diff --git a/pkgs/development/compilers/llvm/12/default.nix b/pkgs/development/compilers/llvm/12/default.nix
index 00922ed96e2..a6d68d2e2a4 100644
--- a/pkgs/development/compilers/llvm/12/default.nix
+++ b/pkgs/development/compilers/llvm/12/default.nix
@@ -108,7 +108,7 @@ let
     # doesn’t support like LLVM. Probably we should move to some other
     # file.
 
-    bintools = callPackage ./bintools.nix {};
+    bintools = callPackage ./bintools {};
 
     lldClang = wrapCCWith rec {
       cc = tools.clang-unwrapped;
@@ -192,18 +192,18 @@ let
 
     libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
 
-    libcxx = callPackage ./libc++ ({ inherit llvm_meta; } //
+    libcxx = callPackage ./libcxx ({ inherit llvm_meta; } //
       (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
         stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
       }));
 
-    libcxxabi = callPackage ./libc++abi ({ inherit llvm_meta; } //
+    libcxxabi = callPackage ./libcxxabi ({ inherit llvm_meta; } //
       (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
         stdenv = overrideCC stdenv buildLlvmTools.lldClangNoLibcxx;
         libunwind = libraries.libunwind;
       }));
 
-    openmp = callPackage ./openmp.nix { inherit llvm_meta; };
+    openmp = callPackage ./openmp { inherit llvm_meta; };
 
     libunwind = callPackage ./libunwind ({ inherit llvm_meta; } //
       (lib.optionalAttrs (stdenv.hostPlatform.useLLVM or false) {
diff --git a/pkgs/development/compilers/llvm/12/libc++/default.nix b/pkgs/development/compilers/llvm/12/libcxx/default.nix
similarity index 98%
rename from pkgs/development/compilers/llvm/12/libc++/default.nix
rename to pkgs/development/compilers/llvm/12/libcxx/default.nix
index d85d890879e..7b3b26b959e 100644
--- a/pkgs/development/compilers/llvm/12/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/12/libcxx/default.nix
@@ -3,7 +3,7 @@
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++";
+  pname = "libcxx";
   inherit version;
 
   src = fetch "libcxx" "1wf3ww29xkx7prs7pdwicy5qqfapib26110jgmkjrbka9z57bjvx";
diff --git a/pkgs/development/compilers/llvm/12/libc++abi/default.nix b/pkgs/development/compilers/llvm/12/libcxxabi/default.nix
similarity index 99%
rename from pkgs/development/compilers/llvm/12/libc++abi/default.nix
rename to pkgs/development/compilers/llvm/12/libcxxabi/default.nix
index 22ec211a3b0..dab6c583e88 100644
--- a/pkgs/development/compilers/llvm/12/libc++abi/default.nix
+++ b/pkgs/development/compilers/llvm/12/libcxxabi/default.nix
@@ -3,7 +3,7 @@
 }:
 
 stdenv.mkDerivation {
-  pname = "libc++abi";
+  pname = "libcxxabi";
   inherit version;
 
   src = fetch "libcxxabi" "1cbmzspwjlr8f6sp73pw6ivf4dpg6rpc61by0q1m2zca2k6yif3a";
diff --git a/pkgs/development/compilers/llvm/12/libc++abi/libcxxabi-wasm.patch b/pkgs/development/compilers/llvm/12/libcxxabi/libcxxabi-wasm.patch
similarity index 100%
rename from pkgs/development/compilers/llvm/12/libc++abi/libcxxabi-wasm.patch
rename to pkgs/development/compilers/llvm/12/libcxxabi/libcxxabi-wasm.patch
diff --git a/pkgs/development/compilers/llvm/12/openmp.nix b/pkgs/development/compilers/llvm/12/openmp/default.nix
similarity index 100%
rename from pkgs/development/compilers/llvm/12/openmp.nix
rename to pkgs/development/compilers/llvm/12/openmp/default.nix