diff --git a/nix/nosv.nix b/nix/nosv.nix
deleted file mode 100644
index 245f5f5..0000000
--- a/nix/nosv.nix
+++ /dev/null
@@ -1,67 +0,0 @@
-# Build with `nix-build nix/old-glibc.nix`
-let
-  # Pin the nixpkgs
-  nixpkgsPath = builtins.fetchTarball {
-    # Descriptive name to make the store path easier to identify
-    name = "nixos-20.09";
-    # Commit hash for nixos-20.09 as of 2021-01-11
-    url = "https://github.com/nixos/nixpkgs/archive/41dddb1283733c4993cb6be9573d5cef937c1375.tar.gz";
-    # Hash obtained using `nix-prefetch-url --unpack <url>`
-    sha256 = "1blbidbmxhaxar2x76nz72bazykc5yxi0algsbrhxgrsvijs4aiw";
-  };
-
-  pkgs = import nixpkgsPath { };
-
-  ovni = pkgs.stdenv.mkDerivation rec {
-    name = "ovni";
-
-    buildInputs = with pkgs; [ cmake openmpi ];
-
-    # Prevent accidental reutilization of previous builds, as we are taking the
-    # current directory as-is
-    preConfigure = ''
-      rm -rf build install
-
-      # There is no /bin/bash
-      patchShebangs test/*.sh
-    '';
-
-    cmakeBuildType = "Debug";
-    cmakeFlags = [ "-DCMAKE_SKIP_BUILD_RPATH=OFF" ];
-    buildFlags = [ "VERBOSE=1" ];
-    preCheck = ''
-      export CTEST_OUTPUT_ON_FAILURE=1
-    '';
-    dontStrip = true;
-    doCheck = true;
-    checkTarget = "test";
-
-    src = ../.;
-  };
-
-  nosv = pkgs.stdenv.mkDerivation rec {
-    pname = "nosv";
-    version = src.shortRev;
-    buildInputs = with pkgs; [ autoreconfHook pkg-config numactl ovni ];
-    configureFlags = [ "--with-ovni=${ovni}" ];
-    dontStrip = true;
-    src = builtins.fetchGit {
-      url = "ssh://git@gitlab-internal.bsc.es/nos-v/nos-v.git";
-      ref = "master";
-    };
-  };
-
-  # Quick fix to avoid rebuilding every time the ovni source changes.
-  # Use this nosv' version below as dependency of ovni-rt
-  nosv' = /nix/store/rvnrbc7ibpw06jdilz6mha7szzxcr2mi-nosv-8936f3e;
-
-  ovni-rt = ovni.overrideAttrs (old: {
-    __impure = true;
-    __noChroot = true;
-    buildInputs = old.buildInputs ++ [ nosv pkgs.strace ];
-    cmakeFlags = old.cmakeFlags ++ [ "-DBUILD_RT_TESTING=ON" ];
-  });
-
-in
-
-  ovni-rt
diff --git a/nix/old-glibc.nix b/nix/old-glibc.nix
deleted file mode 100644
index 09adbcd..0000000
--- a/nix/old-glibc.nix
+++ /dev/null
@@ -1,38 +0,0 @@
-# Build with `nix-build nix/old-glibc.nix`
-let
-  # Define the set of packages from the old 2018.03 nixos release, so we get a
-  # glibc 2.26 which doesn't define the gettid() function, and one of the lowest
-  # cmake versions supported (3.10.2).
-  url = "https://github.com/NixOS/nixpkgs/archive/3e1be2206b4c1eb3299fb633b8ce9f5ac1c32898.tar.gz";
-  pkgs = import (builtins.fetchTarball { inherit url; }) {};
-
-in
-
-  with pkgs;
-
-  stdenv.mkDerivation rec {
-    name = "ovni";
-
-    buildInputs = [ cmake openmpi ];
-
-    # Prevent accidental reutilization of previous builds, as we are taking the
-    # current directory as-is
-    preConfigure = ''
-      rm -rf build install
-
-      # There is no /bin/bash
-      patchShebangs test/*.sh
-    '';
-
-    cmakeBuildType = "Debug";
-    cmakeFlags = [ "-DCMAKE_SKIP_BUILD_RPATH=OFF" ];
-    buildFlags = [ "VERBOSE=1" ];
-    preCheck = ''
-      export CTEST_OUTPUT_ON_FAILURE=1
-    '';
-    dontStrip = true;
-    doCheck = true;
-    checkTarget = "test";
-
-    src = ../.;
-  }