diff --git a/Makefile b/Makefile
index d910be6..1056a52 100644
--- a/Makefile
+++ b/Makefile
@@ -12,14 +12,14 @@ TZPFMS_DATE ?=
 AWK ?= awk
 SED ?= sed
 MANDOC ?= mandoc
-PKGCONF ?= pkgconf
+PKG_CONFIG ?= pkgconf
 SHELLCHECK ?= shellcheck
 
 NOLOCREGEN ?=
 OUTDIR := out/
 BLDDIR := out/build/
 
-SYSTEMD_SYSTEM_UNITDIR := $(shell $(PKGCONF) --variable=systemd_system_unit_dir systemd 2>/dev/null || echo /usr/lib/systemd/system)
+SYSTEMD_SYSTEM_UNITDIR := $(shell $(PKG_CONFIG) --variable=systemd_system_unit_dir systemd 2>/dev/null || echo /usr/lib/systemd/system)
 ifneq "$(TZPFMS_DATE)" ""
 MANUAL_DATE := $(TZPFMS_DATE)
 else ifneq "$(SOURCE_DATE_EPOCH)" ""
@@ -30,12 +30,12 @@ endif
 
 
 PKGS := libzfs libzfs_core tss2-esys tss2-rc
-PKGCONF_LIBS   := $(shell pkg-config --libs   $(PKGS))
-PKGCONF_CFLAGS := $(shell pkg-config --cflags $(PKGS))
+PKG_CONFIG_LIBS   := $(shell $(PKG_CONFIG) --libs   $(PKGS))
+PKG_CONFIG_CFLAGS := $(shell $(PKG_CONFIG) --cflags $(PKGS))
 
 LDFLAGS  += -Wl,--as-needed
-LDLIBS   += -lrt -ltspi -lcrypto $(PKGCONF_LIBS)
-CXXFLAGS += -g -O3 -std=c++17 -fno-exceptions -fno-rtti -Wall -Wextra -pipe -fPIC $(PKGCONF_CFLAGS)
+LDLIBS   += -lrt -ltspi -lcrypto $(PKG_CONFIG_LIBS)
+CXXFLAGS += -g -O3 -std=c++17 -fno-exceptions -fno-rtti -Wall -Wextra -pipe -fPIC $(PKG_CONFIG_CFLAGS)
 CPPFLAGS += -MD -DTZPFMS_VERSION='$(TZPFMS_VERSION)'
 BINARY_SOURCES := $(sort $(wildcard src/bin/*.cpp src/bin/**/*.cpp))
 COMMON_SOURCES := $(filter-out $(BINARY_SOURCES),$(sort $(wildcard src/*.cpp src/**/*.cpp src/**/**/*.cpp src/**/**/**/*.cpp)))