diff --git a/pkgs/development/interpreters/pypy/2.0/default.nix b/pkgs/development/interpreters/pypy/2.0/default.nix
index 2dd681239a6..fb64d804056 100644
--- a/pkgs/development/interpreters/pypy/2.0/default.nix
+++ b/pkgs/development/interpreters/pypy/2.0/default.nix
@@ -47,6 +47,7 @@ let
         --replace "libraries = ['curses']" "libraries = ['ncurses']"
     '';
 
+    setupHook = ./setup-hook.sh;
 
     doCheck = true;
     checkPhase = ''
diff --git a/pkgs/development/interpreters/pypy/2.0/setup-hook.sh b/pkgs/development/interpreters/pypy/2.0/setup-hook.sh
new file mode 100644
index 00000000000..96a04cb05dd
--- /dev/null
+++ b/pkgs/development/interpreters/pypy/2.0/setup-hook.sh
@@ -0,0 +1,15 @@
+addPythonPath() {
+    addToSearchPathWithCustomDelimiter : PYTHONPATH $1/lib/pypy2.0/site-packages
+}
+
+toPythonPath() {
+    local paths="$1"
+    local result=
+    for i in $paths; do
+        p="$i/lib/pypy2.0/site-packages"
+        result="${result}${result:+:}$p"
+    done
+    echo $result
+}
+
+envHooks=(${envHooks[@]} addPythonPath)