set libs "
    $::env(PDK_REF_PATH)/${std_cell_library}/lib/${std_cell_library}__ff_n40C_1v95.lib
    $::env(PDK_REF_PATH)/${special_voltage_library}/lib/${special_voltage_library}__ff_n40C_5v50.lib
    $::env(PDK_REF_PATH)/${special_voltage_library}/lib/${special_voltage_library}__ff_n40C_4v40_lv1v95.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_fd_io__top_gpiov2_ff_ff_n40C_1v95_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_fd_io__top_ground_hvc_wpad_ff_n40C_1v95_5v50_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_fd_io__top_ground_lvc_wpad_ff_n40C_1v95_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_fd_io__top_power_lvc_wpad_ff_n40C_1v95_5v50_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_fd_io__top_xres4v2_ff_ff_n40C_1v95_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_ef_io__gpiov2_pad_wrapped_ff_ff_n40C_1v95_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_ef_io__vccd_lvc_clamped_pad_ff_n40C_1v95_5v50_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_ef_io__vdda_hvc_clamped_pad_ff_n40C_1v95_5v50_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_ef_io__vssa_hvc_clamped_pad_ff_n40C_1v95_5v50_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_ef_io__vddio_hvc_clamped_pad_ff_n40C_1v95_5v50_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_ef_io__vssio_hvc_clamped_pad_ff_n40C_1v95_5v50_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_ef_io__vssd_lvc_clamped3_pad_ff_n40C_1v95_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_ef_io__vccd_lvc_clamped3_pad_ff_n40C_1v95_5v50_5v50.lib
    $::env(PDK_REF_PATH)/${io_library}/lib/sky130_ef_io__vssd_lvc_clamped_pad_ff_n40C_1v95_5v50.lib
    $::env(PDK_REF_PATH)/sky130_sram_macros/lib/sky130_sram_2kbyte_1rw1r_32x512_8_TT_1p8V_25C.lib
"