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+---
+title: Nix pinning
+date: 2018-07-11
+layout: pastebin
+lang: en
+---
+
+```nix
+let
+ # Pin the nixpkgs version
+ stdenv = pkgs.stdenv;
+ pkgsOriginal = import <nixpkgs> {};
+ pkgsSrc = pkgsOriginal.fetchzip {
+ url = "https://github.com/NixOS/nixpkgs/archive/18.03.zip";
+ sha256 = "0hk4y2vkgm1qadpsm4b0q1vxq889jhxzjx3ragybrlwwg54mzp4f";
+ };
+
+ pkgs = import (pkgsSrc) {};
+
+ buildNodeJS = pkgs.callPackage <nixpkgs/pkgs/development/web/nodejs/nodejs.nix> {};
+
+in rec {
+ nodeFromNVMRC = buildNodeJS {
+ version = "8.7.0";
+ sha256 = "16mml3cwjnq7yf9yd67d2dybav3nvbnk89fkixs1wz7fd26d05ss";
+ patches = [];
+ };
+}
+```