diff --git a/make-linux.mk b/make-linux.mk
index 865da2d8b..bfa416aa0 100644
--- a/make-linux.mk
+++ b/make-linux.mk
@@ -62,7 +62,7 @@ ifeq ($(ZT_DEBUG),1)
 	override CFLAGS+=-Wall -Wno-deprecated -g -O -pthread $(INCLUDES) $(DEFS)
 	override CXXFLAGS+=-Wall -Wno-deprecated -g -O -std=c++17 -pthread $(INCLUDES) $(DEFS)
 	ZT_TRACE=1
-	RUSTFLAGS=
+	ZT_CARGO_FLAGS=
 	# The following line enables optimization for the crypto code, since
 	# C25519 in particular is almost UNUSABLE in -O0 even on a 3ghz box!
 node/Salsa20.o node/SHA512.o node/C25519.o node/Poly1305.o: CXXFLAGS=-Wall -O2 -g -pthread $(INCLUDES) $(DEFS)
@@ -72,7 +72,7 @@ else
 	CXXFLAGS?=-O3 -fstack-protector
 	override CXXFLAGS+=-Wall -Wno-deprecated -std=c++17 -pthread $(INCLUDES) -DNDEBUG $(DEFS)
 	LDFLAGS=-pie -Wl,-z,relro,-z,now
-	RUSTFLAGS=--release
+	ZT_CARGO_FLAGS=--release
 endif
 
 ifeq ($(ZT_QNAP), 1)
@@ -438,8 +438,7 @@ debug:	FORCE
 ifeq ($(ZT_SSO_SUPPORTED), 1)
 ifeq ($(ZT_EMBEDDED),)
 zeroidc:	FORCE
-#	export PATH=/root/.cargo/bin:$$PATH; cd zeroidc && cargo build -j1 $(RUSTFLAGS)
-	export PATH=/${HOME}/.cargo/bin:$$PATH; cd rustybits && cargo build $(RUSTFLAGS) -p zeroidc
+	export PATH=/${HOME}/.cargo/bin:$$PATH; cd rustybits && cargo build $(ZT_CARGO_FLAGS) -p zeroidc
 endif
 else
 zeroidc:
@@ -447,7 +446,7 @@ endif
 
 ifeq ($(ZT_CONTROLLER), 1)
 smeeclient:	FORCE
-	export PATH=/${HOME}/.cargo/bin:$$PATH; cd rustybits && cargo build $(RUSTFLAGS) -p smeeclient
+	export PATH=/${HOME}/.cargo/bin:$$PATH; cd rustybits && cargo build $(ZT_CARGO_FLAGS) -p smeeclient
 else
 smeeclient:
 endif
diff --git a/zerotier-one.spec b/zerotier-one.spec
index 12eff934b..5c2c9d810 100644
--- a/zerotier-one.spec
+++ b/zerotier-one.spec
@@ -15,20 +15,32 @@ Requires(pre): /usr/sbin/useradd, /usr/bin/getent
 %endif
 
 %if "%{?dist}" == ".fc36"
-BuildRequires: systemd clang openssl1.1 openssl1.1-devel
-Requires:      systemd openssl1.1
+BuildRequires: systemd clang openssl openssl-devel
+Requires:      systemd openssl
 Requires(pre): /usr/sbin/useradd, /usr/bin/getent
 %endif
 
 %if "%{?dist}" == ".fc37"
-BuildRequires: systemd clang openssl1.1 openssl1.1-devel
-Requires:      systemd openssl1.1
+BuildRequires: systemd clang openssl openssl-devel
+Requires:      systemd openssl
 Requires(pre): /usr/sbin/useradd, /usr/bin/getent
 %endif
 
 %if "%{?dist}" == ".fc38"
-BuildRequires: systemd clang openssl1.1 openssl1.1-devel
-Requires:      systemd openssl1.1
+BuildRequires: systemd clang openssl openssl-devel
+Requires:      systemd openssl
+Requires(pre): /usr/sbin/useradd, /usr/bin/getent
+%endif
+
+%if "%{?dist}" == ".fc39"
+BuildRequires: systemd clang openssl openssl-devel
+Requires:      systemd openssl
+Requires(pre): /usr/sbin/useradd, /usr/bin/getent
+%endif
+
+%if "%{?dist}" == ".fc40"
+BuildRequires: systemd clang openssl openssl-devel
+Requires:      systemd openssl
 Requires(pre): /usr/sbin/useradd, /usr/bin/getent
 %endif