diff --git a/pkgs/applications/graphics/sane/backends/generic.nix b/pkgs/applications/graphics/sane/backends/generic.nix
index 92cec3ca82c..0e8a5f34f6c 100644
--- a/pkgs/applications/graphics/sane/backends/generic.nix
+++ b/pkgs/applications/graphics/sane/backends/generic.nix
@@ -1,5 +1,5 @@
 { stdenv
-, avahi, libjpeg, libusb1, libv4l, net_snmp, libpng
+, avahi, libjpeg, libusb1, libv4l, net-snmp, libpng
 , gettext, pkgconfig
 
 # List of { src name backend } attibute sets - see installFirmware below:
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
     ++ stdenv.lib.optional (libusb1 != null) "--enable-libusb_1_0"
     ;
 
-  buildInputs = [ avahi libusb1 libv4l net_snmp libpng ];
+  buildInputs = [ avahi libusb1 libv4l net-snmp libpng ];
   nativeBuildInputs = [ gettext pkgconfig ];
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/python-modules/easysnmp/default.nix b/pkgs/development/python-modules/easysnmp/default.nix
index 32659b520ba..2602fba7713 100644
--- a/pkgs/development/python-modules/easysnmp/default.nix
+++ b/pkgs/development/python-modules/easysnmp/default.nix
@@ -3,7 +3,7 @@
 , buildPythonPackage
 , pythonAtLeast
 , fetchFromGitHub
-, net_snmp
+, net-snmp
 , openssl
 , pytest
 , pytestcov
@@ -35,12 +35,12 @@ buildPythonPackage rec {
   ];
 
   buildInputs = [
-    net_snmp
+    net-snmp
     openssl
   ];
 
   buildPhase = ''
-    python setup.py build bdist_wheel --basedir=${net_snmp}/bin
+    python setup.py build bdist_wheel --basedir=${lib.getBin net-snmp}/bin
   '';
 
   # Unable to get tests to pass, even running by hand. The pytest tests have
diff --git a/pkgs/misc/drivers/hplip/3.16.11.nix b/pkgs/misc/drivers/hplip/3.16.11.nix
index 993a5144a9d..3b03c300db3 100644
--- a/pkgs/misc/drivers/hplip/3.16.11.nix
+++ b/pkgs/misc/drivers/hplip/3.16.11.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, substituteAll
 , pkgconfig
 , cups, libjpeg, libusb1, python2Packages, sane-backends, dbus, usbutils
-, net_snmp, openssl, nettools
+, net-snmp, openssl, nettools
 , bash, coreutils, utillinux
 , qtSupport ? true
 , withPlugin ? false
@@ -55,7 +55,7 @@ python2Packages.buildPythonApplication {
     libusb1
     sane-backends
     dbus
-    net_snmp
+    net-snmp
     openssl
   ];
 
diff --git a/pkgs/misc/drivers/hplip/3.18.5.nix b/pkgs/misc/drivers/hplip/3.18.5.nix
index 3b78f015f7d..ab1794c1251 100644
--- a/pkgs/misc/drivers/hplip/3.18.5.nix
+++ b/pkgs/misc/drivers/hplip/3.18.5.nix
@@ -2,7 +2,7 @@
 , pkgconfig
 , cups, zlib, libjpeg, libusb1, python2Packages, sane-backends
 , dbus, file, ghostscript, usbutils
-, net_snmp, openssl, perl, nettools
+, net-snmp, openssl, perl, nettools
 , bash, coreutils, utillinux
 , withQt5 ? true
 , withPlugin ? false
@@ -59,7 +59,7 @@ python2Packages.buildPythonApplication {
     dbus
     file
     ghostscript
-    net_snmp
+    net-snmp
     openssl
     perl
     zlib
diff --git a/pkgs/misc/drivers/hplip/default.nix b/pkgs/misc/drivers/hplip/default.nix
index d81032ef270..ecb74f39ab9 100644
--- a/pkgs/misc/drivers/hplip/default.nix
+++ b/pkgs/misc/drivers/hplip/default.nix
@@ -2,7 +2,7 @@
 , pkgconfig
 , cups, zlib, libjpeg, libusb1, python3Packages, sane-backends
 , dbus, file, ghostscript, usbutils
-, net_snmp, openssl, perl, nettools
+, net-snmp, openssl, perl, nettools
 , bash, coreutils, utillinux
 , withQt5 ? true
 , withPlugin ? false
@@ -58,7 +58,7 @@ python3Packages.buildPythonApplication {
     dbus
     file
     ghostscript
-    net_snmp
+    net-snmp
     openssl
     perl
     zlib
diff --git a/pkgs/servers/corosync/default.nix b/pkgs/servers/corosync/default.nix
index faa9976bed8..2d7acda90af 100644
--- a/pkgs/servers/corosync/default.nix
+++ b/pkgs/servers/corosync/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, makeWrapper, pkgconfig, nss, nspr, libqb
-, dbus, rdma-core, libstatgrab, net_snmp
+, dbus, rdma-core, libstatgrab, net-snmp
 , enableDbus ? false
 , enableInfiniBandRdma ? false
 , enableMonitoring ? false
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   ] ++ optional enableDbus dbus
     ++ optional enableInfiniBandRdma rdma-core
     ++ optional enableMonitoring libstatgrab
-    ++ optional enableSnmp net_snmp;
+    ++ optional enableSnmp net-snmp;
 
   configureFlags = [
     "--sysconfdir=/etc"
diff --git a/pkgs/servers/dns/dnsdist/default.nix b/pkgs/servers/dns/dnsdist/default.nix
index d0275a52cc5..0c236fe9315 100644
--- a/pkgs/servers/dns/dnsdist/default.nix
+++ b/pkgs/servers/dns/dnsdist/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig, systemd
 , boost, libsodium, libedit, re2
-, net_snmp, lua, protobuf, openssl, zlib, h2o
+, net-snmp, lua, protobuf, openssl, zlib, h2o
 }:
 
 stdenv.mkDerivation rec {
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkgconfig protobuf ];
-  buildInputs = [ systemd boost libsodium libedit re2 net_snmp lua openssl zlib h2o ];
+  buildInputs = [ systemd boost libsodium libedit re2 net-snmp lua openssl zlib h2o ];
 
   configureFlags = [
     "--enable-libsodium"
diff --git a/pkgs/servers/ldap/389/default.nix b/pkgs/servers/ldap/389/default.nix
index e7bff373c3a..8de4c471e22 100644
--- a/pkgs/servers/ldap/389/default.nix
+++ b/pkgs/servers/ldap/389/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, fetchpatch, autoreconfHook, pkgconfig, doxygen, perl, pam, nspr, nss, openldap
-, db, cyrus_sasl, svrcore, icu, net_snmp, kerberos, pcre, perlPackages, libevent, openssl, python
+, db, cyrus_sasl, svrcore, icu, net-snmp, kerberos, pcre, perlPackages, libevent, openssl, python
 }:
 
 stdenv.mkDerivation rec {
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook pkgconfig doxygen ];
   buildInputs = [
     perl pam nspr nss openldap db cyrus_sasl svrcore icu
-    net_snmp kerberos pcre libevent openssl python
+    net-snmp kerberos pcre libevent openssl python
   ] ++ (with perlPackages; [ MozillaLdap NetAddrIP DBFile ]);
 
   patches = [
@@ -46,7 +46,9 @@ stdenv.mkDerivation rec {
     "--with-db-inc=${db.dev}/include"
     "--with-db-lib=${db.out}/lib"
     "--with-sasl=${cyrus_sasl.dev}"
-    "--with-netsnmp=${net_snmp}"
+    "--with-netsnmp=yes"
+    "--with-netsnmp-inc=${stdenv.lib.getDev net-snmp}/include"
+    "--with-netsnmp-lib=${stdenv.lib.getLib net-snmp}/lib"
   ];
 
   enableParallelBuilding = true;
diff --git a/pkgs/servers/monitoring/plugins/default.nix b/pkgs/servers/monitoring/plugins/default.nix
index 62f40b59d37..887256c85af 100644
--- a/pkgs/servers/monitoring/plugins/default.nix
+++ b/pkgs/servers/monitoring/plugins/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, fetchpatch, autoreconfHook
-, coreutils, gnugrep, gnused, lm_sensors, net_snmp, openssh, openssl, perl
+, coreutils, gnugrep, gnused, lm_sensors, net-snmp, openssh, openssl, perl
 , dnsutils, libdbi, libmysqlclient, zlib, openldap, procps
 , runtimeShell }:
 
@@ -9,7 +9,7 @@ let
   majorVersion = "2.2";
   minorVersion = ".0";
 
-  binPath = makeBinPath [ coreutils gnugrep gnused lm_sensors net_snmp procps ];
+  binPath = makeBinPath [ coreutils gnugrep gnused lm_sensors net-snmp procps ];
 
 in stdenv.mkDerivation {
   name = "monitoring-plugins-${majorVersion}${minorVersion}";
@@ -48,7 +48,7 @@ in stdenv.mkDerivation {
   '';
 
   # !!! make openssh a runtime dependency only
-  buildInputs = [ dnsutils libdbi libmysqlclient net_snmp openldap openssh openssl perl procps zlib ];
+  buildInputs = [ dnsutils libdbi libmysqlclient net-snmp openldap openssh openssl perl procps zlib ];
 
   nativeBuildInputs = [ autoreconfHook ];
 
diff --git a/pkgs/servers/monitoring/prometheus/snmp-exporter.nix b/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
index dfa81d4da83..f3dfccee3bc 100644
--- a/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/snmp-exporter.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, net_snmp }:
+{ stdenv, buildGoPackage, fetchFromGitHub, net-snmp }:
 
 buildGoPackage rec {
   pname = "snmp_exporter";
@@ -13,7 +13,7 @@ buildGoPackage rec {
     sha256 = "1cnz1wapxs3fkghzy6v90s56vd0ngynypyapcpbmx5y66rlpdxx6";
   };
 
-  buildInputs = [ net_snmp ];
+  buildInputs = [ net-snmp ];
 
   doCheck = true;
 
diff --git a/pkgs/servers/monitoring/zabbix/proxy.nix b/pkgs/servers/monitoring/zabbix/proxy.nix
index 53932af6a18..697492d9627 100644
--- a/pkgs/servers/monitoring/zabbix/proxy.nix
+++ b/pkgs/servers/monitoring/zabbix/proxy.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig, libevent, libiconv, openssl, pcre, zlib
 , odbcSupport ? true, unixODBC
-, snmpSupport ? true, net_snmp
+, snmpSupport ? true, net-snmp
 , sshSupport ? true, libssh2
 , sqliteSupport ? false, sqlite
 , mysqlSupport ? false, libmysqlclient
@@ -34,7 +34,7 @@ in
         zlib
       ]
       ++ optional odbcSupport unixODBC
-      ++ optional snmpSupport net_snmp
+      ++ optional snmpSupport net-snmp
       ++ optional sqliteSupport sqlite
       ++ optional sshSupport libssh2
       ++ optional mysqlSupport libmysqlclient
diff --git a/pkgs/servers/monitoring/zabbix/server.nix b/pkgs/servers/monitoring/zabbix/server.nix
index ac5dcca901d..4046cc7d8bb 100644
--- a/pkgs/servers/monitoring/zabbix/server.nix
+++ b/pkgs/servers/monitoring/zabbix/server.nix
@@ -2,7 +2,7 @@
 , jabberSupport ? true, iksemel
 , ldapSupport ? true, openldap
 , odbcSupport ? true, unixODBC
-, snmpSupport ? true, net_snmp
+, snmpSupport ? true, net-snmp
 , sshSupport ? true, libssh2
 , mysqlSupport ? false, libmysqlclient
 , postgresqlSupport ? false, postgresql
@@ -38,7 +38,7 @@ in
       ++ optional odbcSupport unixODBC
       ++ optional jabberSupport iksemel
       ++ optional ldapSupport openldap
-      ++ optional snmpSupport net_snmp
+      ++ optional snmpSupport net-snmp
       ++ optional sshSupport libssh2
       ++ optional mysqlSupport libmysqlclient
       ++ optional postgresqlSupport postgresql;
diff --git a/pkgs/servers/quagga/default.nix b/pkgs/servers/quagga/default.nix
index fc130965cf1..bd679fd3ff8 100644
--- a/pkgs/servers/quagga/default.nix
+++ b/pkgs/servers/quagga/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libcap, libnl, readline, net_snmp, less, perl, texinfo,
+{ stdenv, fetchurl, libcap, libnl, readline, net-snmp, less, perl, texinfo,
   pkgconfig, c-ares }:
 
 stdenv.mkDerivation rec {
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs =
-    [ readline net_snmp c-ares ]
+    [ readline net-snmp c-ares ]
     ++ stdenv.lib.optionals stdenv.isLinux [ libcap libnl ];
 
   nativeBuildInputs = [ pkgconfig perl texinfo ];
diff --git a/pkgs/tools/networking/argus/default.nix b/pkgs/tools/networking/argus/default.nix
index d75234d15d0..bb9abccc933 100644
--- a/pkgs/tools/networking/argus/default.nix
+++ b/pkgs/tools/networking/argus/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, libpcap, bison, flex, cyrus_sasl, tcp_wrappers,
-  pkgconfig, procps, which, wget, lsof, net_snmp, perl }:
+  pkgconfig, procps, which, wget, lsof, net-snmp, perl }:
 
 stdenv.mkDerivation rec {
   pname = "argus";
@@ -10,9 +10,9 @@ stdenv.mkDerivation rec {
     sha256 = "1zzf688dbbcb5z2r9v1p28rddns6znzx35nc05ygza6lp7aknkna";
   };
 
-  propagatedBuildInputs = [ procps which wget lsof net_snmp ];
   nativeBuildInputs = [ pkgconfig bison flex ];
   buildInputs = [ libpcap cyrus_sasl tcp_wrappers ];
+  propagatedBuildInputs = [ procps which wget lsof net-snmp ];
 
   patchPhase = ''
      substituteInPlace events/argus-extip.pl \
@@ -23,8 +23,8 @@ stdenv.mkDerivation rec {
     substituteInPlace events/argus-vmstat.sh \
       --replace vm_stat ${procps}/bin/vmstat
     substituteInPlace events/argus-snmp.sh \
-      --replace /usr/bin/snmpget ${net_snmp}/bin/snmpget \
-      --replace /usr/bin/snmpwalk ${net_snmp}/bin/snmpwalk
+      --replace /usr/bin/snmpget ${stdenv.lib.getBin net-snmp}/bin/snmpget \
+      --replace /usr/bin/snmpwalk ${stdenv.lib.getBin net-snmp}/bin/snmpwalk
   '';
 
   meta = with stdenv.lib; {
diff --git a/pkgs/tools/networking/ifstat-legacy/default.nix b/pkgs/tools/networking/ifstat-legacy/default.nix
index 756e77f1157..72aaaa1e170 100644
--- a/pkgs/tools/networking/ifstat-legacy/default.nix
+++ b/pkgs/tools/networking/ifstat-legacy/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, autoreconfHook, net_snmp }:
+{ stdenv, fetchurl, autoreconfHook, net-snmp }:
 
 stdenv.mkDerivation rec {
   pname = "ifstat-legacy";
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "01zmv6vk5kh5xmd563xws8a1qnxjb6b6kv59yzz9r3rrghxhd6c5";
   };
 
-  buildInputs = [ net_snmp ];
+  buildInputs = [ net-snmp ];
 
   nativeBuildInputs = [ autoreconfHook ];
 
diff --git a/pkgs/tools/networking/keepalived/default.nix b/pkgs/tools/networking/keepalived/default.nix
index 34f8e5620f7..142e2e79bbf 100644
--- a/pkgs/tools/networking/keepalived/default.nix
+++ b/pkgs/tools/networking/keepalived/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub
-, libnfnetlink, libnl, net_snmp, openssl
+, libnfnetlink, libnl, net-snmp, openssl
 , pkgconfig, autoreconfHook }:
 
 stdenv.mkDerivation rec {
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     libnfnetlink
     libnl
-    net_snmp
+    net-snmp
     openssl
   ];
 
diff --git a/pkgs/tools/networking/lldpd/default.nix b/pkgs/tools/networking/lldpd/default.nix
index b8ba1357f5f..23dbb60767e 100644
--- a/pkgs/tools/networking/lldpd/default.nix
+++ b/pkgs/tools/networking/lldpd/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchurl, pkgconfig, removeReferencesTo
-, libevent, readline, net_snmp, openssl
+, libevent, readline, net-snmp, openssl
 }:
 
 stdenv.mkDerivation rec {
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ pkgconfig removeReferencesTo ];
-  buildInputs = [ libevent readline net_snmp openssl ];
+  buildInputs = [ libevent readline net-snmp openssl ];
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/tools/system/collectd/plugins.nix b/pkgs/tools/system/collectd/plugins.nix
index c29ebc925bc..f1a87847a5c 100644
--- a/pkgs/tools/system/collectd/plugins.nix
+++ b/pkgs/tools/system/collectd/plugins.nix
@@ -24,7 +24,7 @@
 , lm_sensors
 , mongoc
 , mosquitto
-, net_snmp
+, net-snmp
 , postgresql
 , protobufc
 , python
@@ -243,10 +243,10 @@ let
       buildInputs = stdenv.lib.optionals stdenv.isLinux [ libatasmart udev ];
     };
     snmp = {
-      buildInputs = stdenv.lib.optionals stdenv.isLinux [ net_snmp ];
+      buildInputs = stdenv.lib.optionals stdenv.isLinux [ net-snmp ];
     };
     snmp_agent = {
-      buildInputs = stdenv.lib.optionals stdenv.isLinux [ net_snmp ];
+      buildInputs = stdenv.lib.optionals stdenv.isLinux [ net-snmp ];
     };
     statsd = {};
     swap = {};
diff --git a/pkgs/tools/system/rsyslog/default.nix b/pkgs/tools/system/rsyslog/default.nix
index 96f0a754f61..d12411d6145 100644
--- a/pkgs/tools/system/rsyslog/default.nix
+++ b/pkgs/tools/system/rsyslog/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, pkgconfig, autoreconfHook, libestr, json_c, zlib, pythonPackages, fastJson
 , libkrb5 ? null, systemd ? null, jemalloc ? null, libmysqlclient ? null, postgresql ? null
-, libdbi ? null, net_snmp ? null, libuuid ? null, curl ? null, gnutls ? null
+, libdbi ? null, net-snmp ? null, libuuid ? null, curl ? null, gnutls ? null
 , libgcrypt ? null, liblognorm ? null, openssl ? null, librelp ? null, libksi ? null
 , liblogging ? null, libnet ? null, hadoop ? null, rdkafka ? null
 , libmongo-client ? null, czmq ? null, rabbitmq-c ? null, hiredis ? null, mongoc ? null
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkgconfig autoreconfHook ];
   buildInputs = [
     fastJson libestr json_c zlib pythonPackages.docutils libkrb5 jemalloc
-    postgresql libdbi net_snmp libuuid curl gnutls libgcrypt liblognorm openssl
+    postgresql libdbi net-snmp libuuid curl gnutls libgcrypt liblognorm openssl
     librelp libksi liblogging libnet hadoop rdkafka libmongo-client czmq
     rabbitmq-c hiredis mongoc
   ] ++ stdenv.lib.optional (libmysqlclient != null) libmysqlclient
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
     (mkFlag (libmysqlclient != null)  "mysql")
     (mkFlag (postgresql != null)      "pgsql")
     (mkFlag (libdbi != null)          "libdbi")
-    (mkFlag (net_snmp != null)        "snmp")
+    (mkFlag (net-snmp != null)        "snmp")
     (mkFlag (libuuid != null)         "uuid")
     (mkFlag (curl != null)            "elasticsearch")
     (mkFlag (gnutls != null)          "gnutls")
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 4f522103003..ccd6dcc0d3c 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -391,6 +391,7 @@ mapAliases ({
   smbclient = samba; # added 2018-04-25
   slim = throw "slim has been removed. Please use a different display-manager"; # added 2019-11-11
   slimThemes = throw "slimThemes has been removed because slim has been also"; # added 2019-11-11
+  net_snmp = net-snmp; # added 2019-12-21
   spaceOrbit = space-orbit; # addewd 2016-05-23
   speech_tools = speech-tools; # added 2018-04-25
   speedtest_cli = speedtest-cli;  # added 2015-02-17
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 063b7172766..693769ff39c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2079,7 +2079,7 @@ in
     libmysqlclient = null;
     postgresql = null;
     libdbi = null;
-    net_snmp = null;
+    net-snmp = null;
     libuuid = null;
     gnutls = null;
     libgcrypt = null;
@@ -15429,7 +15429,7 @@ in
 
   check-esxi-hardware = callPackage ../servers/monitoring/plugins/esxi.nix {};
 
-  net_snmp = callPackage ../servers/monitoring/net-snmp { };
+  net-snmp = callPackage ../servers/monitoring/net-snmp { };
 
   newrelic-sysmond = callPackage ../servers/monitoring/newrelic-sysmond { };
 
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index ec8df201741..3a045f330eb 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1803,7 +1803,7 @@ in {
 
   easysnmp = callPackage ../development/python-modules/easysnmp {
     openssl = pkgs.openssl;
-    net_snmp = pkgs.net_snmp;
+    net-snmp = pkgs.net-snmp;
   };
 
   iowait = callPackage ../development/python-modules/iowait {};