diff --git a/go.nix b/go.nix
new file mode 100644
index 0000000..d222715
--- /dev/null
+++ b/go.nix
@@ -0,0 +1,12 @@
+let
+  # Pinned nixpkgs, deterministic. Last updated: 2/12/21.
+  #pkgs = import (fetchTarball("https://github.com/NixOS/nixpkgs/archive/a58a0b5098f0c2a389ee70eb69422a052982d990.tar.gz")) {};
+  # Rolling updates, not deterministic.
+  pkgs = import (fetchTarball "channel:nixpkgs-unstable") { };
+in pkgs.mkShell {
+  buildInputs = with pkgs; [
+	go
+	gcc
+];
+  shellHook = "";
+}
diff --git a/rust.nix b/rust.nix
index e2da27a..0a721ff 100644
--- a/rust.nix
+++ b/rust.nix
@@ -3,7 +3,15 @@ let
   #pkgs = import (fetchTarball("https://github.com/NixOS/nixpkgs/archive/a58a0b5098f0c2a389ee70eb69422a052982d990.tar.gz")) {};
   # Rolling updates, not deterministic.
   pkgs = import (fetchTarball "channel:nixpkgs-unstable") { };
+  PKG_CONFIG_PATH = "${pkgs.openssl.dev}/lib/pkgconfig";
 in pkgs.mkShell {
-  buildInputs = [ pkgs.cargo pkgs.rustc pkgs.zsh pkgs.bacon ];
+  buildInputs = with pkgs; [
+    cargo
+    rustc
+    zsh
+    bacon
+    pkg-config
+    openssl
+];
   shellHook = "";
 }