diff --git a/board.mk b/board.mk
new file mode 100644
index 00000000..7d6e96ef
--- /dev/null
+++ b/board.mk
@@ -0,0 +1,21 @@
+# Different Fomu hardware revisions are wired differently and thus
+# require different configurations for yosys and nextpnr.
+# Configuration is performed by setting the environment variable FOMU_REV accordingly.
+ifeq ($(FOMU_REV),evt1)
+YOSYSFLAGS?= -D EVT=1
+PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt2.pcf
+else ifeq ($(FOMU_REV),evt2)
+YOSYSFLAGS?= -D EVT=1
+PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt2.pcf
+else ifeq ($(FOMU_REV),evt3)
+YOSYSFLAGS?= -D EVT=1
+PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt3.pcf
+else ifeq ($(FOMU_REV),hacker)
+YOSYSFLAGS?= -D HACKER=1
+PNRFLAGS  ?= --up5k --package uwg30 --pcf ../../pcf/fomu-hacker.pcf
+else ifeq ($(FOMU_REV),pvt)
+YOSYSFLAGS?= -D PVT=1
+PNRFLAGS  ?= --up5k --package uwg30 --pcf ../../pcf/fomu-pvt.pcf
+else
+$(error Unrecognized FOMU_REV value. must be "evt1", "evt2", "evt3", "pvt", or "hacker")
+endif
diff --git a/mixed-hdl/blink/Makefile b/mixed-hdl/blink/Makefile
index 316e79cf..51a4a163 100644
--- a/mixed-hdl/blink/Makefile
+++ b/mixed-hdl/blink/Makefile
@@ -1,24 +1,4 @@
-# Different Fomu hardware revisions are wired differently and thus
-# require different configurations for yosys and nextpnr.
-# Configuration is performed by setting the environment variable FOMU_REV accordingly.
-ifeq ($(FOMU_REV),evt1)
-YOSYSFLAGS?= -D EVT=1
-PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt2.pcf
-else ifeq ($(FOMU_REV),evt2)
-YOSYSFLAGS?= -D EVT=1
-PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt2.pcf
-else ifeq ($(FOMU_REV),evt3)
-YOSYSFLAGS?= -D EVT=1
-PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt3.pcf
-else ifeq ($(FOMU_REV),hacker)
-YOSYSFLAGS?= -D HACKER=1
-PNRFLAGS  ?= --up5k --package uwg30 --pcf ../../pcf/fomu-hacker.pcf
-else ifeq ($(FOMU_REV),pvt)
-YOSYSFLAGS?= -D PVT=1
-PNRFLAGS  ?= --up5k --package uwg30 --pcf ../../pcf/fomu-pvt.pcf
-else
-$(error Unrecognized FOMU_REV value. must be "evt1", "evt2", "evt3", "pvt", or "hacker")
-endif
+include ../../board.mk
 
 # VHDL top with instantiated Verilog
 VHDL_SYN_FILES = ../../vhdl/sb_ice40_components.vhd blink.vhd
diff --git a/verilog/blink/Makefile b/verilog/blink/Makefile
index 4e0ed205..6fce5cf4 100644
--- a/verilog/blink/Makefile
+++ b/verilog/blink/Makefile
@@ -3,27 +3,7 @@
 # This Makefile shows the steps to generate a DFU loadable image onto
 # Fomu hacker board.
 
-# Different Fomu hardware revisions are wired differently and thus
-# require different configurations for yosys and nextpnr.
-# Configuration is performed by setting the environment variable FOMU_REV accordingly.
-ifeq ($(FOMU_REV),evt1)
-YOSYSFLAGS?= -D EVT=1
-PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt2.pcf
-else ifeq ($(FOMU_REV),evt2)
-YOSYSFLAGS?= -D EVT=1
-PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt2.pcf
-else ifeq ($(FOMU_REV),evt3)
-YOSYSFLAGS?= -D EVT=1
-PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt3.pcf
-else ifeq ($(FOMU_REV),hacker)
-YOSYSFLAGS?= -D HACKER=1
-PNRFLAGS  ?= --up5k --package uwg30 --pcf ../../pcf/fomu-hacker.pcf
-else ifeq ($(FOMU_REV),pvt)
-YOSYSFLAGS?= -D PVT=1
-PNRFLAGS  ?= --up5k --package uwg30 --pcf ../../pcf/fomu-pvt.pcf
-else
-$(error Unrecognized FOMU_REV value. must be "evt1", "evt2", "evt3", "pvt", or "hacker")
-endif
+include ../../board.mk
 
 # Default target: run all required targets to build the DFU image.
 all: blink.dfu
diff --git a/vhdl/blink/Makefile b/vhdl/blink/Makefile
index ab0b5a73..154facd5 100644
--- a/vhdl/blink/Makefile
+++ b/vhdl/blink/Makefile
@@ -1,24 +1,4 @@
-# Different Fomu hardware revisions are wired differently and thus
-# require different configurations for yosys and nextpnr.
-# Configuration is performed by setting the environment variable FOMU_REV accordingly.
-ifeq ($(FOMU_REV),evt1)
-YOSYSFLAGS?= -D EVT=1
-PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt2.pcf
-else ifeq ($(FOMU_REV),evt2)
-YOSYSFLAGS?= -D EVT=1
-PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt2.pcf
-else ifeq ($(FOMU_REV),evt3)
-YOSYSFLAGS?= -D EVT=1
-PNRFLAGS  ?= --up5k --package sg48 --pcf ../../pcf/fomu-evt3.pcf
-else ifeq ($(FOMU_REV),hacker)
-YOSYSFLAGS?= -D HACKER=1
-PNRFLAGS  ?= --up5k --package uwg30 --pcf ../../pcf/fomu-hacker.pcf
-else ifeq ($(FOMU_REV),pvt)
-YOSYSFLAGS?= -D PVT=1
-PNRFLAGS  ?= --up5k --package uwg30 --pcf ../../pcf/fomu-pvt.pcf
-else
-$(error Unrecognized FOMU_REV value. must be "evt1", "evt2", "evt3", "pvt", or "hacker")
-endif
+include ../../board.mk
 
 VHDL_SYN_FILES = ../sb_ice40_components.vhd blink.vhd