diff --git a/tests/simple-client.sh b/tests/simple-client.sh
index 066a0ca..fc5b693 100755
--- a/tests/simple-client.sh
+++ b/tests/simple-client.sh
@@ -11,3 +11,8 @@ ghc                            \
     $hsTmpDir/Simple.hs        \
     tests/TestClient.hs        \
     > /dev/null
+
+
+. @makeWrapper@/nix-support/setup-hook
+
+flagsBefore="" wrapProgram "${hsTmpDir}/simple-client" --prefix DYLD_LIBRARY_PATH : @grpc@/lib
diff --git a/tests/simple-server.sh b/tests/simple-server.sh
index b66db5c..c8a679a 100755
--- a/tests/simple-server.sh
+++ b/tests/simple-server.sh
@@ -11,3 +11,7 @@ ghc                            \
     $hsTmpDir/Simple.hs        \
     tests/TestServer.hs        \
     > /dev/null
+
+. @makeWrapper@/nix-support/setup-hook
+
+flagsBefore="" wrapProgram "${hsTmpDir}/simple-server" --prefix DYLD_LIBRARY_PATH : @grpc@/lib