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.8

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in this Annual Report on Form 40-F for the year ended December 31, 2022 of Osisko Development Corp. of our report dated March 24, 2023, relating to the consolidated financial statements which appears in .2 to this Annual Report on Form 40-F.

/s/ PricewaterhouseCoopers LLP

Montreal, Canada

March 31, 2023