--- a/debian/patches/cflags.patch	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/cflags.patch	2020-04-11 19:24:35.361790449 +0100
@@ -0,0 +1,27 @@
+Description: Make the build reproducible
+Author: Chris Lamb <lamby@debian.org>
+Last-Update: 2020-04-11
+
+--- sprai-0.9.9.23+dfsg.orig/makefile
++++ sprai-0.9.9.23+dfsg/makefile
+@@ -38,16 +38,16 @@ check_circularity.pl \
+ all: $(COMPILED)
+ 
+ bfmt72s: bfmt72s.c
+-	$(CC) -Wall -O3 -g -o $@ $<
++	$(CC) -Wall -O3 -g $(CFLAGS) -o $@ $<
+ 
+ nss2v_v3: nss2v_v3.c
+-	$(CC) -Wall -O3 -g -o $@ $<
++	$(CC) -Wall -O3 -g $(CFLAGS) -o $@ $<
+ 
+ myrealigner: myrealigner.c
+-	$(CC) -Wall -O3 -g -o $@ $^
++	$(CC) -Wall -O3 -g $(CFLAGS) -o $@ $^
+ 
+ m52bfmt7: m52bfmt7.c
+-	$(CC) -Wall -O3 -g -o $@ $<
++	$(CC) -Wall -O3 -g $(CFLAGS) -o $@ $<
+ 
+ 
+ install: $(COMPILED) $(SCRIPTS)
--- a/debian/patches/series	2020-04-11 19:13:38.925486011 +0100
--- b/debian/patches/series	2020-04-11 19:24:35.365790510 +0100
@@ -1,3 +1,4 @@
 libexec.patch
 example-specs.patch
 makefile.patch
+cflags.patch
--- a/debian/rules	2020-04-11 19:13:38.925486011 +0100
--- b/debian/rules	2020-04-11 19:23:53.109145637 +0100
@@ -1,5 +1,8 @@
 #!/usr/bin/make -f
 
+DPKG_EXPORT_BUILDFLAGS = 1
+include /usr/share/dpkg/buildflags.mk
+
 %:
 	dh $@