diff --git a/digressions/.gitignore b/digressions/.gitignore
new file mode 100644
index 0000000..0086ed8
--- /dev/null
+++ b/digressions/.gitignore
@@ -0,0 +1 @@
+/temperatures
diff --git a/digressions/Makefile b/digressions/Makefile
new file mode 100644
index 0000000..1884913
--- /dev/null
+++ b/digressions/Makefile
@@ -0,0 +1,5 @@
+CFLAGS += -g -Wall -Wextra
+
+all: temperatures
+
+.PHONY: all
diff --git a/math-replay/temperatures.c b/digressions/temperatures.c
similarity index 100%
rename from math-replay/temperatures.c
rename to digressions/temperatures.c
diff --git a/math-replay/.gitignore b/math-replay/.gitignore
index 0038a65..d9766f8 100644
--- a/math-replay/.gitignore
+++ b/math-replay/.gitignore
@@ -2,4 +2,3 @@
 *.log
 *.pdf
 *.html
-temperatures
diff --git a/math-replay/Makefile b/math-replay/Makefile
index d5f6778..918cb2d 100644
--- a/math-replay/Makefile
+++ b/math-replay/Makefile
@@ -1,8 +1,5 @@
-CFLAGS += -g -Wall -Wextra
-
 ALL := $(patsubst %.haml,%.html,$(shell find . -name '*.haml'))
 ALL += $(patsubst %.tex,%.pdf,$(shell find . -name '*.tex'))
-ALL += temperatures
 
 
 %.html:%.haml