--- opengfx-0.5.2-source.orig/Makefile
+++ opengfx-0.5.2-source/Makefile
@@ -99,8 +99,8 @@
 AWK            ?= awk
 GREP           ?= grep
 PYTHON         ?= python
-UNIX2DOS       ?= unix2dos
-UNIX2DOS_FLAGS ?= $(shell [ -n $(UNIX2DOS) ] && $(UNIX2DOS) -q --version 2>/dev/null && echo "-q" || echo "")
+UNIX2DOS       ?= $(shell which unix2dos 2>/dev/null)
+UNIX2DOS_FLAGS ?= $(shell [ -n $(UNIX2DOS) ] && $(UNIX2DOS) -q --version 2>/dev/null >&2 && echo "-q" || echo "")
 
 # Graphics processing
 GIMP           ?= gimp
@@ -196,7 +196,7 @@
 endif
 
 # Days of commit since 2000-1-1 00-00
-REPO_DAYS_SINCE_2000 ?= $(shell $(PYTHON) -c "from datetime import date; print (date(`echo "$(REPO_DATE)" | sed s/-/,/g | sed s/,0/,/g`)-date(2000,1,1)).days")
+REPO_DAYS_SINCE_2000 ?= $(shell $(PYTHON) -c "from datetime import date; print ((date(`echo "$(REPO_DATE)" | sed s/-/,/g | sed s/,0/,/g`)-date(2000,1,1)).days)")
 
 # Filename addition, if we're not building the default branch
 REPO_BRANCH_STRING ?= $(shell if [ "$(REPO_BRANCH)" = "$(DEFAULT_BRANCH_NAME)" ]; then echo ""; else echo "-$(REPO_BRANCH)"; fi)
@@ -377,7 +377,11 @@
 		| sed -e "s/$(REPLACE_REVISION)/$(NEWGRF_VERSION)/" \
 		| sed -e "s/$(REPLACE_FILENAME)/$(OUTPUT_FILENAME)/" \
 		> $@
-	$(_V) [ -z "$(UNIX2DOS)" ] || $(UNIX2DOS) $(UNIX2DOS_FLAGS) $@
+ifeq ($(UNIX2DOS),)
+	$(_E) Warning: unix2dos not available. $@ keeps current eol style.
+else
+	$(_V) $(UNIX2DOS) $(UNIX2DOS_FLAGS) $@
+endif
 
 clean::
 	$(_E) "[CLEAN DOC]"
@@ -714,7 +718,7 @@
 	$(_E)
 endif
 	$(_E) "Release:"
-	$(_E) "bananas:     Upload bundle to BaNaNaS
+	$(_E) "bananas:     Upload bundle to BaNaNaS"
 	$(_E)
 	$(_E) "Valid command line variables are:"
 	$(_E) "Helper programmes:"