Fixing Makefile so:

* it does not fail on manpage install (folder was not found)
* CPLDIR is always defined as per 3rd condition, even if all fails
* moved from mkdir + cp + chmod to mkdir + install

Makefile

@@ -1,6 +1,6 @@
 PREFIX ?= /usr/local
 BINDIR ?= $(PREFIX)/bin
-MANDIR ?= $(PREFIX)/share/man
+MANDIR ?= $(PREFIX)/share/man/man1
 
 # Attempt to find bash completion dir in order of preference
 ifneq ($(wildcard /etc/bash_completion.d/.),)
@@ -14,23 +14,22 @@ endif
 
 HAS_PKGCONFIG := $(shell command -v pkg-config 2> /dev/null)
 ifdef HAS_PKGCONFIG
-  CPLDIR ?= $$(pkg-config --variable=completionsdir bash-completion 2> /dev/null)
+  CPLDIR ?= $(shell pkg-config --variable=completionsdir bash-completion 2> /dev/null)
 endif
 
 install:
 	@echo Installing the executable to $(BINDIR)
 	@mkdir -p $(BINDIR)
-	@cp -f burrow $(BINDIR)/burrow
-	@chmod 755 $(BINDIR)/burrow
+	@install -m 755 burrow $(BINDIR)
 	@echo Installing the manual page to $(MANDIR)/man1
 	@mkdir -p $(MANDIR)
-	@cp -f burrow.1 $(MANDIR)/man1/burrow.1
-	@chmod 644 $(MANDIR)/man1/burrow.1
+	@install -m 644 burrow.1 $(MANDIR)
 ifdef CPLDIR
+ifneq ($(CPLDIR),)
 	@echo Installing the command completion to $(CPLDIR)
 	@mkdir -p $(CPLDIR)
-	@cp -f burrow.d $(CPLDIR)/burrow
-	@chmod 644 $(CPLDIR)/burrow
+	@install -m 644 burrow.d $(CPLDIR)/burrow
+endif
 endif
 
 uninstall:
@@ -39,8 +38,10 @@ uninstall:
 	@echo Removing the manual page from $(MANDIR)/man1
 	@rm -f $(BINDIR)/man1/burrow.1
 ifdef CPLDIR
+ifneq ($(CPLDIR),)
 	@echo Removing the command completion from $(CPLDIR)
 	@rm -f $(CPLDIR)/burrow
 endif
+endif
 
 .PHONY: install uninstall