Can't flash raspberry pi pico because of missing subpackage device/rp

[cswank]

When trying to flash a raspberry pi pico I get the following error:

tinygo flash -target=pico . ../../.cache/tinygo/goroot-67b9bbbc4b1312608c9e71f167ff82793f2d673dc4aa54440a127d983b0a6125/src/machine/board_pico.go:6:2: package device/rp is not in std (/home/craig/.cache/tinygo/goroot-67b9bbbc4b1312608c9e71f167ff82793f2d673dc4aa54440a127d983b0a6125/src/device/rp)

This occurs due to the following imports in src/machine:

board_ae_rp2040.go board_badger2040.go board_challenger_rp2040.go board_feather_rp2040.go board_gopher-badge.go board_kb2040.go board_macropad-rp2040.go board_nano-rp2040.go board_pico.go board_qtpy_rp2040.go board_thingplus_rp2040.go board_tufty2040.go board_waveshare-rp2040-zero.go board_xiao-rp2040.go machine_rp2040_adc.go machine_rp2040_clocks.go machine_rp2040.go machine_rp2040_gpio.go machine_rp2040_i2c.go machine_rp2040_pll.go machine_rp2040_pwm.go machine_rp2040_resets.go machine_rp2040_rng.go machine_rp2040_rtc.go machine_rp2040_spi.go machine_rp2040_sync.go machine_rp2040_timer.go machine_rp2040_uart.go machine_rp2040_usb_fix_usb_device_enumeration.go machine_rp2040_usb.go machine_rp2040_watchdog.go machine_rp2040_xosc.go