diff --git a/gnu/packages/golang-xyz.scm b/gnu/packages/golang-xyz.scm
index 02cf5bc8e7..1ef3f1c129 100644
--- a/gnu/packages/golang-xyz.scm
+++ b/gnu/packages/golang-xyz.scm
@@ -11718,8 +11718,8 @@ very eas to use.")
                 (delete-file-recursively "examples"))))
         (add-before 'build 'go-generate
           (lambda* (#:key import-path #:allow-other-keys)
-            (with-directory-excursion (string-append "src/" import-path)
-              (invoke "go" "generate" "-v" "-n" "_gen")))))))
+            (with-directory-excursion (string-append "src/" import-path "/_gen")
+              (invoke "go" "generate" "-v" "-n")))))))
     (propagated-inputs (list go-github-com-klauspost-cpuid-v2))
     (home-page "https://github.com/klauspost/reedsolomon")
     (synopsis "Reed-Solomon algorithm implementation in Golang")