add resulting file

sources2.nix

+# Generated by crosstool-to-nix.tcl
+{ fetchurl, fetchgit, fetchFromGitHub, ... }:
+{
+  "autoconf-2.69.tar.xz" = fetchurl {
+    url    = "https://ftpmirror.gnu.org/gnu/autoconf/autoconf-2.69.tar.xz";
+    sha512 = "995d3e5a8eb1eb37e2b7fae53c6ec7a9b4df997286b7d643344818f94636756b1bf5ff5ea9155e755cb9461149a853dfbf2886fc6bd7132e5afa9c168e306e9b";
+  };
+  "automake-1.16.1.tar.xz" = fetchurl {
+    url    = "https://ftpmirror.gnu.org/gnu/automake/automake-1.16.1.tar.xz";
+    sha512 = "4013bd31f4903b10875caa7d6ac16a14623a4eb91aa758924dee5b990e234fb50848d131e2dbdbbbc32f89c41a14f9c52a0064c37aa6760c524d607b354b13c3";
+  };
+  "gmp-6.1.2.tar.xz" = fetchurl {
+    url    = "https://gmplib.org/download/gmp/gmp-6.1.2.tar.xz";
+    sha512 = "9f098281c0593b76ee174b722936952671fab1dae353ce3ed436a31fe2bc9d542eca752353f6645b7077c1f395ab4fdd355c58e08e2a801368f1375690eee2c6";
+  };
+  "mpfr-4.0.1.tar.xz" = fetchurl {
+    url    = "http://www.mpfr.org/mpfr-4.0.1/mpfr-4.0.1.tar.xz";
+    sha512 = "137ad68bc1e33a155edc1247fcdba27f999cf48ed526773136584090ddf2cfdfc9ea79fbf74ea1943b835b4b1ff29b05087114738c6ad3b485848540f30cac4f";
+  };
+  "isl-0.19.tar.xz" = fetchurl {
+    url    = "http://isl.gforge.inria.fr/isl-0.19.tar.xz";
+    sha512 = "eeda0405d38f77a18c6e69128948dc29af7e44ce827e9fb538d3844c6e22db3b4126287ca0937d9bee7b528bbab7aad8d3729db36e74864196f57e81943dade4";
+  };
+  "mpc-1.1.0.tar.gz" = fetchurl {
+    url    = "http://www.multiprecision.org/downloads/mpc-1.1.0.tar.gz";
+    sha512 = "72d657958b07c7812dc9c7cbae093118ce0e454c68a585bfb0e2fa559f1bf7c5f49b93906f580ab3f1073e5b595d23c6494d4d76b765d16dde857a18dd239628";
+  };
+  "expat-2.2.5.tar.bz2" = fetchurl {
+    url    = "http://downloads.sourceforge.net/project/expat/expat/2.2.5/expat-2.2.5.tar.bz2";
+    sha512 = "8226970a7e5d2b8d7818081758ca59bb6ce2d655feaa9d3a92481629000b73fde4782f50343d58ec4e1cebe75649e1980f636775a731d8aa4b55ceb843d9f637";
+  };
+  "ncurses-6.1.tar.gz" = fetchurl {
+    url    = "ftp://invisible-island.net/ncurses/ncurses-6.1.tar.gz";
+    sha512 = "e308af43f8b7e01e98a55f4f6c4ee4d1c39ce09d95399fa555b3f0cdf5fd0db0f4c4d820b4af78a63f6cf6d8627587114a40af48cfc066134b600520808a77ee";
+  };
+  "binutils" = fetchFromGitHub {
+    owner  = "espressif";
+    repo   = "binutils-gdb";
+    rev    = "esp-2020r3-binutils";
+    sha256 = "sha256-y4REODVCiUn/F6PSNTsLZjpKBWrAD9InFF0UWzYl5is=";
+  };
+  "gcc" = fetchFromGitHub {
+    owner  = "espressif";
+    repo   = "gcc";
+    rev    = "esp-2020r3";
+    sha256 = "sha256-qy4i/QYGdSVaxX21kIC0FgnzbzQz1+kG3rmK+LHECW8=";
+  };
+  "newlib" = fetchFromGitHub {
+    owner  = "espressif";
+    repo   = "newlib-esp32";
+    rev    = "esp-2020r3";
+    sha256 = "sha256-IMe+IEXVWegjyLkHnaNKzvvcVBDT9nWlcbcL0xtH86s=";
+  };
+  "gdb" = fetchFromGitHub {
+    owner  = "espressif";
+    repo   = "binutils-gdb";
+    rev    = "esp-2020r3-gdb";
+    sha256 = "sha256-FDEDJZxMpo2/goXqVaDBZc60AWP8MaGWCgieqmjkRyM=";
+  };
+}