diff --git a/pkgs/applications/science/physics/sacrifice/default.nix b/pkgs/applications/science/physics/sacrifice/default.nix
index 64b88dcc3d4f..d43a05f1c616 100644
--- a/pkgs/applications/science/physics/sacrifice/default.nix
+++ b/pkgs/applications/science/physics/sacrifice/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, boost, hepmc, lhapdf, pythia, makeWrapper }:
+{ stdenv, fetchurl, boost, hepmc2, lhapdf, pythia, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "sacrifice-${version}";
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "10bvpq63kmszy1habydwncm0j1dgvam0fkrmvkgbkvf804dcjp6g";
   };
 
-  buildInputs = [ boost hepmc lhapdf pythia ];
+  buildInputs = [ boost hepmc2 lhapdf pythia ];
   nativeBuildInputs = [ makeWrapper ];
 
   patches = [
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   '';
 
   configureFlags = [
-    "--with-HepMC=${hepmc}"
+    "--with-HepMC=${hepmc2}"
     "--with-pythia=${pythia}"
   ];
 
diff --git a/pkgs/applications/science/physics/sherpa/default.nix b/pkgs/applications/science/physics/sherpa/default.nix
index 7cb3e8881caf..1d61c612563f 100644
--- a/pkgs/applications/science/physics/sherpa/default.nix
+++ b/pkgs/applications/science/physics/sherpa/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, gfortran, hepmc, fastjet, lhapdf, rivet, sqlite }:
+{ stdenv, fetchurl, gfortran, hepmc2, fastjet, lhapdf, rivet, sqlite }:
 
 stdenv.mkDerivation rec {
   name = "sherpa-${version}";
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [
     "--with-sqlite3=${sqlite.dev}"
-    "--enable-hepmc2=${hepmc}"
+    "--enable-hepmc2=${hepmc2}"
     "--enable-fastjet=${fastjet}"
     "--enable-lhapdf=${lhapdf}"
     "--enable-rivet=${rivet}"
diff --git a/pkgs/development/libraries/physics/hepmc/default.nix b/pkgs/development/libraries/physics/hepmc2/default.nix
similarity index 100%
rename from pkgs/development/libraries/physics/hepmc/default.nix
rename to pkgs/development/libraries/physics/hepmc2/default.nix
diff --git a/pkgs/development/libraries/physics/hepmc/in_source.patch b/pkgs/development/libraries/physics/hepmc2/in_source.patch
similarity index 100%
rename from pkgs/development/libraries/physics/hepmc/in_source.patch
rename to pkgs/development/libraries/physics/hepmc2/in_source.patch
diff --git a/pkgs/development/libraries/physics/pythia/default.nix b/pkgs/development/libraries/physics/pythia/default.nix
index 2e17e49dcdb1..e6b351c206df 100644
--- a/pkgs/development/libraries/physics/pythia/default.nix
+++ b/pkgs/development/libraries/physics/pythia/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, boost, fastjet, hepmc, lhapdf, rsync, zlib }:
+{ stdenv, fetchurl, boost, fastjet, hepmc2, lhapdf, rsync, zlib }:
 
 stdenv.mkDerivation rec {
   name = "pythia-${version}";
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "0y8w5gdaczg8vdw63rkgjr1dcvqs2clqkdia34p30xcwgm1jgv7q";
   };
 
-  buildInputs = [ boost fastjet hepmc zlib rsync lhapdf ];
+  buildInputs = [ boost fastjet hepmc2 zlib rsync lhapdf ];
 
   preConfigure = ''
     patchShebangs ./configure
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [
     "--enable-shared"
-    "--with-hepmc2=${hepmc}"
+    "--with-hepmc2=${hepmc2}"
     "--with-lhapdf6=${lhapdf}"
   ];
 
diff --git a/pkgs/development/libraries/physics/rivet/default.nix b/pkgs/development/libraries/physics/rivet/default.nix
index c8dae0c2b51a..c068424e416e 100644
--- a/pkgs/development/libraries/physics/rivet/default.nix
+++ b/pkgs/development/libraries/physics/rivet/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fastjet, ghostscript, gsl, hepmc, imagemagick, less, python2, texlive, yoda, which, makeWrapper }:
+{ stdenv, fetchurl, fastjet, ghostscript, gsl, hepmc2, imagemagick, less, python2, texlive, yoda, which, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "rivet-${version}";
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
     xkeyval
     xstring
     ;};
-  buildInputs = [ hepmc imagemagick python2 latex makeWrapper ];
+  buildInputs = [ hepmc2 imagemagick python2 latex makeWrapper ];
   propagatedBuildInputs = [ fastjet ghostscript gsl yoda ];
 
   preConfigure = ''
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [
     "--with-fastjet=${fastjet}"
-    "--with-hepmc=${hepmc}"
+    "--with-hepmc=${hepmc2}"
     "--with-yoda=${yoda}"
   ];
 
diff --git a/pkgs/development/libraries/physics/thepeg/default.nix b/pkgs/development/libraries/physics/thepeg/default.nix
index 046413c64f49..272761977bae 100644
--- a/pkgs/development/libraries/physics/thepeg/default.nix
+++ b/pkgs/development/libraries/physics/thepeg/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, boost, fastjet, gsl, hepmc, lhapdf, rivet, zlib }:
+{ stdenv, fetchurl, boost, fastjet, gsl, hepmc2, lhapdf, rivet, zlib }:
 
 stdenv.mkDerivation rec {
   name = "thepeg-${version}";
@@ -9,10 +9,10 @@ stdenv.mkDerivation rec {
     sha256 = "1rmmwhk9abn9mc9j3127axjwpvymv21ld4wcivwz01pldkxh06n6";
   };
 
-  buildInputs = [ boost fastjet gsl hepmc lhapdf rivet zlib ];
+  buildInputs = [ boost fastjet gsl hepmc2 lhapdf rivet zlib ];
 
   configureFlags = [
-    "--with-hepmc=${hepmc}"
+    "--with-hepmc=${hepmc2}"
     "--with-rivet=${rivet}"
     "--without-javagui"
   ];
diff --git a/pkgs/development/python-modules/pyhepmc/default.nix b/pkgs/development/python-modules/pyhepmc/default.nix
index 0ff269c98740..26a91a313ee4 100644
--- a/pkgs/development/python-modules/pyhepmc/default.nix
+++ b/pkgs/development/python-modules/pyhepmc/default.nix
@@ -42,9 +42,9 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [ pkgs.swig ];
-  buildInputs = [ pkgs.hepmc ];
+  buildInputs = [ pkgs.hepmc2 ];
 
-  HEPMCPATH = pkgs.hepmc;
+  HEPMCPATH = pkgs.hepmc2;
 
   checkPhase = ''
     ${python.interpreter} test/test1.py
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index a1ad553e0481..10ca9315d351 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -145,6 +145,7 @@ mapAliases ({
   gupnptools = gupnp-tools;  # added 2015-12-19
   gutenberg = zola;  # added 2018-11-17
   heimdalFull = heimdal; # added 2018-05-01
+  hepmc = hepmc2; # added 2019-08-05
   hicolor_icon_theme = hicolor-icon-theme; # added 2018-02-25
   htmlTidy = html-tidy;  # added 2014-12-06
   iana_etc = iana-etc;  # added 2017-03-08
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f2b89a411d62..ce7a54cce5e6 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -23336,7 +23336,7 @@ in
 
   g4py = callPackage ../development/libraries/physics/geant4/g4py { };
 
-  hepmc = callPackage ../development/libraries/physics/hepmc { };
+  hepmc2 = callPackage ../development/libraries/physics/hepmc2 { };
 
   hepmc3 = callPackage ../development/libraries/physics/hepmc3 { };