4 files changed, 0 insertions, 11 deletions
diff --git a/pkgs/development/libraries/msgpack/generic.nix b/pkgs/development/libraries/msgpack/generic.nix
index 306becf0c180..de277329961b 100644
--- a/pkgs/development/libraries/msgpack/generic.nix
+++ b/pkgs/development/libraries/msgpack/generic.nix
@@ -15,8 +15,6 @@ stdenv.mkDerivation rec {
   cmakeFlags = []
     ++ stdenv.lib.optional (stdenv.hostPlatform != stdenv.buildPlatform)
                            "-DMSGPACK_BUILD_EXAMPLES=OFF"
-    ++ stdenv.lib.optional (stdenv.hostPlatform.libc == "msvcrt")
-                           "-DCMAKE_SYSTEM_NAME=Windows"
     ;
 
   meta = with stdenv.lib; {
diff --git a/pkgs/development/libraries/nlohmann_json/default.nix b/pkgs/development/libraries/nlohmann_json/default.nix
index ffb735e725ae..25d4386cec2c 100644
--- a/pkgs/development/libraries/nlohmann_json/default.nix
+++ b/pkgs/development/libraries/nlohmann_json/default.nix
@@ -18,8 +18,6 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [
     "-DBuildTests=${if doCheck then "ON" else "OFF"}"
-  ] ++ stdenv.lib.optionals (stdenv.hostPlatform.libc == "msvcrt") [
-    "-DCMAKE_SYSTEM_NAME=Windows"
   ];
 
   doCheck = stdenv.hostPlatform == stdenv.buildPlatform;
diff --git a/pkgs/tools/compression/brotli/default.nix b/pkgs/tools/compression/brotli/default.nix
index 754c0e581563..3b4d5519028b 100644
--- a/pkgs/tools/compression/brotli/default.nix
+++ b/pkgs/tools/compression/brotli/default.nix
@@ -15,9 +15,6 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
-  cmakeFlags = stdenv.lib.optional
-    (stdenv.hostPlatform.libc == "msvcrt") "-DCMAKE_SYSTEM_NAME=Windows";
-
   outputs = [ "out" "dev" "lib" ];
 
   doCheck = true;
@@ -59,4 +56,3 @@ stdenv.mkDerivation rec {
     platforms = platforms.all;
   };
 }
-
diff --git a/pkgs/tools/text/html-tidy/default.nix b/pkgs/tools/text/html-tidy/default.nix
index 51ce4baa0beb..fcdba6cbba48 100644
--- a/pkgs/tools/text/html-tidy/default.nix
+++ b/pkgs/tools/text/html-tidy/default.nix
@@ -13,9 +13,6 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake libxslt/*manpage*/ ];
 
-  cmakeFlags = stdenv.lib.optional
-    (stdenv.hostPlatform.libc or null == "msvcrt") "-DCMAKE_SYSTEM_NAME=Windows";
-
   # ATM bin/tidy is statically linked, as upstream provides no other option yet.
   # https://github.com/htacg/tidy-html5/issues/326#issuecomment-160322107