diff --git a/pkgs/development/libraries/nghttp3/default.nix b/pkgs/development/libraries/nghttp3/default.nix
index 21b9fdf419c8..fc2416c2cfb0 100644
--- a/pkgs/development/libraries/nghttp3/default.nix
+++ b/pkgs/development/libraries/nghttp3/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitHub
 , autoreconfHook, pkg-config
-, cunit, file
+, cunit, file, ncurses
 }:
 
 stdenv.mkDerivation rec {
@@ -14,7 +14,8 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-pV1xdQa5RBz17jDINC2uN1Q+jpa2edDwqTqf8D5VU3E=";
   };
 
-  nativeBuildInputs = [ autoreconfHook pkg-config cunit file ];
+  nativeBuildInputs = [ autoreconfHook pkg-config file ];
+  checkInputs = [ cunit ncurses ];
 
   preConfigure = ''
     substituteInPlace ./configure --replace /usr/bin/file ${file}/bin/file
@@ -23,12 +24,13 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "dev" ];
 
   doCheck = true;
+  enableParallelBuilding = true;
 
   meta = with lib; {
     homepage = "https://github.com/ngtcp2/nghttp3";
     description = "nghttp3 is an implementation of HTTP/3 mapping over QUIC and QPACK in C.";
     license = licenses.mit;
-    platforms = platforms.linux;
+    platforms = platforms.unix;
     maintainers = with maintainers; [ izorkin ];
   };
 }
diff --git a/pkgs/development/libraries/ngtcp2/default.nix b/pkgs/development/libraries/ngtcp2/default.nix
index dfe07c39e326..650516d360cf 100644
--- a/pkgs/development/libraries/ngtcp2/default.nix
+++ b/pkgs/development/libraries/ngtcp2/default.nix
@@ -1,7 +1,8 @@
 { lib, stdenv, fetchFromGitHub
 , autoreconfHook, pkg-config
-, cunit, file
-, jemalloc, libev, nghttp3, quictls
+, cunit, file, ncurses
+, libev, nghttp3, quictls
+, withJemalloc ? false, jemalloc
 }:
 
 stdenv.mkDerivation rec {
@@ -15,8 +16,9 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-uBmD26EYT8zxmHD5FuHCbEuTdWxer/3uhRp8PhUT87M=";
   };
 
-  nativeBuildInputs = [ autoreconfHook pkg-config cunit file ];
-  buildInputs = [ jemalloc libev nghttp3 quictls ];
+  nativeBuildInputs = [ autoreconfHook pkg-config file ];
+  buildInputs = [ libev nghttp3 quictls ] ++ lib.optional withJemalloc jemalloc;
+  checkInputs = [ cunit ncurses ];
 
   preConfigure = ''
     substituteInPlace ./configure --replace /usr/bin/file ${file}/bin/file
@@ -25,12 +27,13 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "dev" ];
 
   doCheck = true;
+  enableParallelBuilding = true;
 
   meta = with lib; {
     homepage = "https://github.com/ngtcp2/ngtcp2";
     description = "ngtcp2 project is an effort to implement QUIC protocol which is now being discussed in IETF QUICWG for its standardization.";
     license = licenses.mit;
-    platforms = platforms.linux;
+    platforms = platforms.unix;
     maintainers = with maintainers; [ izorkin ];
   };
 }