40 Eridani A Starfleet Construction Yards

From Memory Alpha, the free Star Trek reference.

The 40 Eridani A Starfleet Construction Yards are Federation shipyards located in the solar system of 40 Eridani A in the 24th century.

The Miranda-class starship Brattain was built by Yoyodyne Division at these yards on stardate 22519.5. (TNG: "Night Terrors")

The Nebula-class starship Phoenix was built by Yoyodyne Division at these yards on stardate 40250.5. (TNG: "The Wounded")

The existence of these shipyards is not from aired dialog, but is derived from the text of the starship dedication plaques.