Shaykh of shias, as-Saduq narrated in his book “Man la yahdurhul faqih” (1/187):

وسأله سماعة بن مهران ” عن زيارة القبور وبناء المساجد فيها، فقال:
أما زيارة القبور فلا بأس بها، ولا يبنى عندها مساجد “.

Translation:

And Samah ibn Mihran asked him about visiting graves and building mosques upon them. And he said: As for visiting graves, there is nothing wrong with this, and DON’T BUILD NEAR IT MOSQUES.

وقال النبي صلى الله عليه وآله: ” لا تتخذوا قبري قبلة ولا مسجدا فإن الله عز وجل لعن اليهود حين اتخذوا قبور أنبيائهم مساجد “

Translation:

Messenger of Allah (sallalahu alaihi wa ali) said: Don’t take my grave as qiblah nor as mosque, because Allah Azwajal cursed Jews when they took graves of their prophets as mosques.

And in footnote you can see that muhaqiq said that chain of this report is strong.

Another shaykh of shias, at-Toose in his “Tahzib al-Ahkam” (1/461) narrated:

عن أبي عبد الله عليه السلام قال: نهى رسول الله صلى الله عليه وآله أن يصلى على قبر أو يقعد عليه أو يبنى عليه.

Translation:

 From Abu Abdullah (alaihi salam): Messenger of Allah (sallalahu alaihi wa ali) forbade to pray upon graves, or sit upon them or build upon them.

SubhanAllah! COMPARE THIS WORDS OF IMAM, WITH ATTITUDE OF MODERN SHIAS! They build mosques almost upon each grave they see!

And they have build shrine even on the grave of Abu Lulu.