diff --git a/pkgs/applications/science/misc/root/5.nix b/pkgs/applications/science/misc/root/5.nix
index 1f0fc663647a..871f5ece9cfe 100644
--- a/pkgs/applications/science/misc/root/5.nix
+++ b/pkgs/applications/science/misc/root/5.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, pcre, pkgconfig, python2
+{ stdenv, fetchurl, fetchpatch, cmake, pcre, pkgconfig, python2
 , libX11, libXpm, libXft, libXext, libGLU_combined, zlib, libxml2, lzma, gsl_1
 , Cocoa, OpenGL, cf-private, noSplash ? false }:
 
@@ -19,11 +19,30 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./sw_vers_root5.patch
+
+    (fetchpatch {
+      name = "enable_new_gcc.patch";
+      url = "https://aur.archlinux.org/cgit/aur.git/plain/enable_new_gcc.patch?h=root5&id=91c50876081a0af36f84ec4f0f9dba869107fa4f";
+      sha256 = "1rnp0xlw0yqi7mjs4w145njd79i8kkir1qik7zwicdik9axf8ygm";
+    })
+
+    # prevents rootcint from looking in /usr/includes and such
+    ./purify_include_paths_root5.patch
+
+    # disable dictionary generation for stuff that includes libc headers
+    # our glibc requires a modern compiler
+    ./disable_libc_dicts_root5.patch
   ];
 
   preConfigure = ''
     patchShebangs build/unix/
     ln -s ${stdenv.lib.getDev stdenv.cc.libc}/include/AvailabilityMacros.h cint/cint/include/
+  ''
+  # Fix CINTSYSDIR for "build" version of rootcint
+  # This is probably a bug that breaks out-of-source builds
+  + ''
+    substituteInPlace cint/cint/src/loadfile.cxx\
+      --replace 'env = "cint";' 'env = "'`pwd`'/cint";'
   '' + stdenv.lib.optionalString noSplash ''
     substituteInPlace rootx/src/rootx.cxx --replace "gNoLogo = false" "gNoLogo = true"
   '';
@@ -73,8 +92,5 @@ stdenv.mkDerivation rec {
     description = "A data analysis framework";
     platforms = platforms.unix;
     maintainers = with maintainers; [ veprbl ];
-    # needs to be adapted to work with modern glibc
-    # it works on darwin by impurely picking up system's libc headers
-    broken = stdenv.isLinux;
   };
 }
diff --git a/pkgs/applications/science/misc/root/disable_libc_dicts_root5.patch b/pkgs/applications/science/misc/root/disable_libc_dicts_root5.patch
new file mode 100644
index 000000000000..abd6222847ef
--- /dev/null
+++ b/pkgs/applications/science/misc/root/disable_libc_dicts_root5.patch
@@ -0,0 +1,27 @@
+diff --git a/cint/ROOT/CMakeLists.txt b/cint/ROOT/CMakeLists.txt
+--- a/cint/ROOT/CMakeLists.txt
++++ b/cint/ROOT/CMakeLists.txt
+@@ -47,21 +47,13 @@ set(CINTSTLDLLHEADERS
+     ${CMAKE_SOURCE_DIR}/cint/cint/lib/stdstrct/stdcxxfunc.h
+   )
+ set(CINTINCDLLNAMES 
+-    stdfunc 
++#    stdfunc 
+ #    stdcxxfunc
+    )
+ set(CINTINCDLLHEADERS
+-    ${CMAKE_SOURCE_DIR}/cint/cint/lib/stdstrct/stdfunc.h 
++#    ${CMAKE_SOURCE_DIR}/cint/cint/lib/stdstrct/stdfunc.h 
+ #    ${CMAKE_SOURCE_DIR}/cint/cint/lib/stdstrct/stdcxxfunc.h
+    )
+-if(NOT WIN32)
+-  set(CINTSTLDLLNAMES ${CINTSTLDLLNAMES}  valarray)
+-  set(CINTSTLDLLHEADERS ${CINTSTLDLLHEADERS} ${CINTDLLDIR}/vary.h)
+-  set(CINTINCDLLNAMES ${CINTINCDLLNAMES} posix ipc)
+-  set(CINTINCDLLHEADERS ${CINTINCDLLHEADERS} 
+-    ${CMAKE_SOURCE_DIR}/cint/cint/lib/posix/exten.h 
+-    ${CMAKE_SOURCE_DIR}/cint/cint/lib/ipc/ipcif.h)
+-endif()
+ 
+ set(CINTBUILDLOADER
+     vector 
diff --git a/pkgs/applications/science/misc/root/purify_include_paths_root5.patch b/pkgs/applications/science/misc/root/purify_include_paths_root5.patch
new file mode 100644
index 000000000000..6773603b8ad3
--- /dev/null
+++ b/pkgs/applications/science/misc/root/purify_include_paths_root5.patch
@@ -0,0 +1,204 @@
+diff --git a/cint/cint/src/loadfile.cxx b/cint/cint/src/loadfile.cxx
+--- a/cint/cint/src/loadfile.cxx
++++ b/cint/cint/src/loadfile.cxx
+@@ -1365,92 +1365,6 @@ int G__statfilename(const char *filenamein, struct stat *statBuf,
+          }
+       }         
+ #endif /* G__EDU_VERSION */
+-      
+-#ifdef G__VISUAL
+-      /**********************************************
+-       * try /msdev/include
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         workname.Format("/msdev/include/%s%s",filename(),addpost[i2]);
+-         res = stat( workname, statBuf );         
+-         if (res==0) {
+-            if (fullPath) fullPath->Swap(workname);
+-            return res;
+-         }
+-      }
+-#endif /* G__VISUAL */
+-         
+-#ifdef G__SYMANTEC
+-      /**********************************************
+-       * try /sc/include
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         workname.Format("/sc/include/%s%s",filename(),addpost[i2]);
+-         res = stat( workname, statBuf );         
+-         if (res==0) {
+-            if (fullPath) fullPath->Swap(workname);
+-            return res;
+-         }
+-      }
+-#endif // G__SYMANTEC
+-         
+-#ifndef G__WIN32
+-      /**********************************************
+-       * try /usr/include/filename
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         workname.Format("/usr/include/%s%s",filename(),addpost[i2]);
+-         res = stat( workname, statBuf );         
+-         if (res==0) {
+-            if (fullPath) fullPath->Swap(workname);
+-            return res;
+-         }
+-      }
+-#endif
+-      
+-#ifdef __GNUC__
+-      /**********************************************
+-       * try /usr/include/g++/filename
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         workname.Format("/usr/include/g++/%s%s",filename(),addpost[i2]);
+-         res = stat( workname, statBuf );         
+-         if (res==0) {
+-            if (fullPath) fullPath->Swap(workname);
+-            return res;
+-         }
+-      }
+-#endif /* __GNUC__ */
+-      
+-#ifndef G__WIN32
+-      /* #ifdef __hpux */
+-      /**********************************************
+-       * try /usr/include/CC/filename
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         workname.Format("/usr/include/CC/%s%s",filename(),addpost[i2]);
+-         res = stat( workname, statBuf );         
+-         if (res==0) {
+-            if (fullPath) fullPath->Swap(workname);
+-            return res;
+-         }
+-      }         
+-#endif
+-         
+-#ifndef G__WIN32
+-      /**********************************************
+-       * try /usr/include/codelibs/filename
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         workname.Format("/usr/include/codelibs/%s%s"
+-                         ,filename(),addpost[i2]);
+-         res = stat( workname, statBuf );         
+-         if (res==0) {
+-            if (fullPath) fullPath->Swap(workname);
+-            return res;
+-         }
+-      }
+-#endif
+    }
+    return -1;
+ }
+@@ -1960,107 +1874,6 @@ int G__loadfile(const char *filenamein)
+       }
+       if(G__ifile.fp) break;
+ #endif /* G__EDU_VERSION */
+-
+-#ifdef G__VISUAL
+-      /**********************************************
+-       * try /msdev/include
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         G__snprintf(G__ifile.name,G__MAXFILENAME,"/msdev/include/%s%s",filename(),addpost[i2]);
+-#ifndef G__WIN32
+-        G__ifile.fp = fopen(G__ifile.name,"r");
+-#else
+-        G__ifile.fp = fopen(G__ifile.name,"rb");
+-#endif
+-        G__globalcomp=G__store_globalcomp;
+-      }
+-      if(G__ifile.fp) break;
+-#endif /* G__VISUAL */
+-
+-#ifdef G__SYMANTEC
+-      /**********************************************
+-       * try /sc/include
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         G__snprintf(G__ifile.name,G__MAXFILENAME,"/sc/include/%s%s",filename(),addpost[i2]);
+-#ifndef G__WIN32
+-        G__ifile.fp = fopen(G__ifile.name,"r");
+-#else
+-        G__ifile.fp = fopen(G__ifile.name,"rb");
+-#endif
+-        G__globalcomp=G__store_globalcomp;
+-      }
+-      if(G__ifile.fp) break;
+-#endif /* G__SYMANTEC */
+-
+-#ifndef G__WIN32
+-      /**********************************************
+-       * try /usr/include/filename
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         G__snprintf(G__ifile.name,G__MAXFILENAME,"/usr/include/%s%s",filename(),addpost[i2]);
+-#ifndef G__WIN32
+-        G__ifile.fp = fopen(G__ifile.name,"r");
+-#else
+-        G__ifile.fp = fopen(G__ifile.name,"rb");
+-#endif
+-        G__globalcomp=G__store_globalcomp;
+-      }
+-      if(G__ifile.fp) break;
+-#endif
+-
+-#ifdef __GNUC__
+-      /**********************************************
+-       * try /usr/include/g++/filename
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         G__snprintf(G__ifile.name,G__MAXFILENAME,"/usr/include/g++/%s%s",filename(),addpost[i2]);
+-#ifndef G__WIN32
+-        G__ifile.fp = fopen(G__ifile.name,"r");
+-#else
+-        G__ifile.fp = fopen(G__ifile.name,"rb");
+-#endif
+-        G__globalcomp=G__store_globalcomp;
+-      }
+-      if(G__ifile.fp) break;
+-#endif /* __GNUC__ */
+-
+-#ifndef G__WIN32
+-/* #ifdef __hpux */
+-      /**********************************************
+-       * try /usr/include/CC/filename
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-         G__snprintf(G__ifile.name,G__MAXFILENAME,"/usr/include/CC/%s%s",filename(),addpost[i2]);
+-#ifndef G__WIN32
+-        G__ifile.fp = fopen(G__ifile.name,"r");
+-#else
+-        G__ifile.fp = fopen(G__ifile.name,"rb");
+-#endif
+-        G__globalcomp=G__store_globalcomp;
+-      }
+-      if(G__ifile.fp) break;
+-/* #endif __hpux */
+-#endif
+-
+-#ifndef G__WIN32
+-/* #ifdef __hpux */
+-      /**********************************************
+-       * try /usr/include/codelibs/filename
+-       **********************************************/
+-      if('\0'!=G__cintsysdir[0]) {
+-        G__snprintf(G__ifile.name,G__MAXFILENAME,"/usr/include/codelibs/%s%s"
+-                    ,filename(),addpost[i2]);
+-#ifndef G__WIN32
+-        G__ifile.fp = fopen(G__ifile.name,"r");
+-#else
+-        G__ifile.fp = fopen(G__ifile.name,"rb");
+-#endif
+-        G__globalcomp=G__store_globalcomp;
+-      }
+-      if(G__ifile.fp) break;
+-/* #endif __hpux */
+-#endif
+     }
+   }
+