diff --git a/nix/lib.inc.sh b/nix/lib.inc.sh
new file mode 100644
index 0000000..0e83f35
--- /dev/null
+++ b/nix/lib.inc.sh
@@ -0,0 +1,10 @@
+function wrap() {
+    local TOOL="$1"
+    local REPO="$2"
+    shift
+    shift
+
+    SHELL_NIX="$REPO/shell.nix"
+    QUOTED_ARGS="$(printf "${1+ %q}" "$@")"
+    exec nix-shell "$SHELL_NIX" --pure --command "$TOOL $QUOTED_ARGS"
+}
diff --git a/nix/node b/nix/node
new file mode 100755
index 0000000..0642232
--- /dev/null
+++ b/nix/node
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+REPO=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+source "$REPO/nix/lib.inc.sh"
+
+wrap node "$REPO" "$@"
diff --git a/nix/yarn b/nix/yarn
new file mode 100755
index 0000000..ad1671a
--- /dev/null
+++ b/nix/yarn
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+REPO=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+source "$REPO/nix/lib.inc.sh"
+
+wrap yarn "$REPO" "$@"
diff --git a/shell.nix b/shell.nix
index dd47264..6934ce6 100644
--- a/shell.nix
+++ b/shell.nix
@@ -12,6 +12,7 @@ stdenv.mkDerivation rec {
     nodejs-16_x
     rsync
     sqlite
+    yarn
     zlib
   ];