diff --git a/pkgs/development/compilers/llvm/4/libc++/default.nix b/pkgs/development/compilers/llvm/4/libc++/default.nix
index 6344304b84b..2b543b9d793 100644
--- a/pkgs/development/compilers/llvm/4/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/4/libc++/default.nix
@@ -44,11 +44,6 @@ stdenv.mkDerivation rec {
 
   linkCxxAbi = stdenv.isLinux;
 
-  postInstall = ''
-    mv $out/lib/libc++.a $out/lib/libc++_static.a
-    cp ${./libc++.a} $out/lib/libc++.a
-  '';
-
   setupHooks = [
     ../../../../../build-support/setup-hooks/role.bash
     ./setup-hook.sh
diff --git a/pkgs/development/compilers/llvm/4/libc++/libc++.a b/pkgs/development/compilers/llvm/4/libc++/libc++.a
deleted file mode 100644
index f676948115e..00000000000
--- a/pkgs/development/compilers/llvm/4/libc++/libc++.a
+++ /dev/null
@@ -1 +0,0 @@
-INPUT(-lc++_static -lc++abi)
diff --git a/pkgs/development/compilers/llvm/5/libc++/default.nix b/pkgs/development/compilers/llvm/5/libc++/default.nix
index 6dc81e10163..b182f1250e7 100644
--- a/pkgs/development/compilers/llvm/5/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/5/libc++/default.nix
@@ -38,11 +38,6 @@ stdenv.mkDerivation rec {
 
   linkCxxAbi = stdenv.isLinux;
 
-  postInstall = ''
-    mv $out/lib/libc++.a $out/lib/libc++_static.a
-    cp ${./libc++.a} $out/lib/libc++.a
-  '';
-
   setupHooks = [
     ../../../../../build-support/setup-hooks/role.bash
     ./setup-hook.sh
diff --git a/pkgs/development/compilers/llvm/5/libc++/libc++.a b/pkgs/development/compilers/llvm/5/libc++/libc++.a
deleted file mode 100644
index f676948115e..00000000000
--- a/pkgs/development/compilers/llvm/5/libc++/libc++.a
+++ /dev/null
@@ -1 +0,0 @@
-INPUT(-lc++_static -lc++abi)
diff --git a/pkgs/development/compilers/llvm/6/libc++/default.nix b/pkgs/development/compilers/llvm/6/libc++/default.nix
index b90b6b7b58c..3a165e9da7b 100644
--- a/pkgs/development/compilers/llvm/6/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/6/libc++/default.nix
@@ -38,11 +38,6 @@ stdenv.mkDerivation rec {
 
   linkCxxAbi = stdenv.isLinux;
 
-  postInstall = ''
-    mv $out/lib/libc++.a $out/lib/libc++_static.a
-    cp ${./libc++.a} $out/lib/libc++.a
-  '';
-
   setupHooks = [
     ../../../../../build-support/setup-hooks/role.bash
     ./setup-hook.sh
diff --git a/pkgs/development/compilers/llvm/6/libc++/libc++.a b/pkgs/development/compilers/llvm/6/libc++/libc++.a
deleted file mode 100644
index f676948115e..00000000000
--- a/pkgs/development/compilers/llvm/6/libc++/libc++.a
+++ /dev/null
@@ -1 +0,0 @@
-INPUT(-lc++_static -lc++abi)
diff --git a/pkgs/development/compilers/llvm/7/libc++/default.nix b/pkgs/development/compilers/llvm/7/libc++/default.nix
index 8a13f3eb590..d372984dac7 100644
--- a/pkgs/development/compilers/llvm/7/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/7/libc++/default.nix
@@ -36,11 +36,6 @@ stdenv.mkDerivation rec {
 
   linkCxxAbi = stdenv.isLinux;
 
-  postInstall = ''
-    mv $out/lib/libc++.a $out/lib/libc++_static.a
-    cp ${./libc++.a} $out/lib/libc++.a
-  '';
-
   setupHooks = [
     ../../../../../build-support/setup-hooks/role.bash
     ./setup-hook.sh
diff --git a/pkgs/development/compilers/llvm/7/libc++/libc++.a b/pkgs/development/compilers/llvm/7/libc++/libc++.a
deleted file mode 100644
index f676948115e..00000000000
--- a/pkgs/development/compilers/llvm/7/libc++/libc++.a
+++ /dev/null
@@ -1 +0,0 @@
-INPUT(-lc++_static -lc++abi)