Code change:
}; }; <del> eclipse-platform = eclipse-platform-46; eclipse-platform-45 = buildEclipse { name = "eclipse-platform-4.5"; description = "Eclipse platform"; sources = { "x86_64-linux" = fetchurl { url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.5-201506032000/eclipse-platform-4.5-linux-gtk-x86_64.tar.gz; sha256 = "1510j41yr86pbzwf48kjjdd46nkpkh8zwn0hna0cqvsw1gk2vqcg"; }; "i686-linux" = fetchurl { url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.5-201506032000/eclipse-platform-4.5-linux-gtk.tar.gz; sha256 = "1f97jd3qbi3830y3djk8bhwzd9whsq8gzfdk996chxc55prn0qbd"; }; }; }; eclipse-platform-451 = buildEclipse { name = "eclipse-platform-4.5.1"; description = "Eclipse platform"; </del> <ins> eclipse-sdk-37 = buildEclipse { name = "eclipse-sdk-3.7"; description = "Eclipse Classic"; </ins> sources = { "x86_64-linux" = fetchurl { <del> url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.5.1-201509040015/eclipse-platform-4.5.1-linux-gtk-x86_64.tar.gz; sha256 = "1m7bzyi20yss6cz74d7hvhxj1cddcpgzxjia5wcjycsvq33kkny0"; </del> <ins> url = http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops/R-3.7.2-201202080800/eclipse-SDK-3.7.2-linux-gtk-x86_64.tar.gz; sha256 = "0nf4nv7awhp1k8b1hjb7chpjyjrqnyszsjbc4dlk9phpjv3j4wg5"; </ins> }; "i686-linux" = fetchurl { <del> url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.5.1-201509040015/eclipse-platform-4.5.1-linux-gtk.tar.gz; sha256 = "17x8w4k0rba0c0v9ghxdl0zqfadla5c1aakfd5k0q9q3x3qi6rxp"; </del> <ins> url = http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops/R-3.7.2-201202080800/eclipse-SDK-3.7.2-linux-gtk.tar.gz; sha256 = "1isn7i45l9kyn2yx6vm88jl1gnxph8ynank0aaa218cg8kdygk7j"; </ins> }; }; }; <ins> eclipse_sdk_37 = eclipse-sdk-37; # backward compatibility, added 2016-01-30 </ins> <del> eclipse-platform-452 = buildEclipse { name = "eclipse-platform-4.5.2"; description = "Eclipse platform"; sources = { "x86_64-linux" = fetchurl { url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.5.2-201602121500/eclipse-SDK-4.5.2-linux-gtk-x86_64.tar.gz; sha256 = "13dsd5f5i39wd0sr2bgp57hd2msn8g2dnmw5j8hfwif22c62py47"; }; "i686-linux" = fetchurl { url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.5.2-201602121500/eclipse-SDK-4.5.2-linux-gtk.tar.gz; sha256 = "00jsmbrl4xhpbgd8hyxijgzqdic700kd3yw2qwgl0cs3ncvybxvq"; }; }; }; eclipse-platform-46 = buildEclipse { name = "eclipse-platform-4.6"; description = "Eclipse platform"; sources = { "x86_64-linux" = fetchurl { url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.6-201606061100/eclipse-SDK-4.6-linux-gtk-x86_64.tar.gz; sha256 = "02lfa0f4j53q4ks3nal4jxnm1vc6xck2k9zng58izfh49v73jyjd"; }; "i686-linux" = fetchurl { url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.6-201606061100/eclipse-SDK-4.6-linux-gtk.tar.gz; sha256 = "053hsy87jmr9phn934a4qny959d6inxjx8nlcmxa2165ra8d7qfr"; }; }; }; </del> <ins> ################### Eclipse with Plugins ############################################################################# </ins> eclipseWithPlugins = { eclipse, plugins ? [], jvmArgs ? [] }: let

Related discussion:
text: See We should probably remove some of the Eclipse versions we have as we seem to be carrying lots of them. If there are objections to removing, we should at the very least clean up this area.
you can probably close this one now?