diff --git a/pkgs/applications/science/math/sage/sage-src.nix b/pkgs/applications/science/math/sage/sage-src.nix
index 44a0c22d2b3..c18adc7fae9 100644
--- a/pkgs/applications/science/math/sage/sage-src.nix
+++ b/pkgs/applications/science/math/sage/sage-src.nix
@@ -110,6 +110,12 @@ stdenv.mkDerivation rec {
       name = "pari-2.11.0.patch";
       url = "https://git.sagemath.org/sage.git/patch/?id=7af4748cab37d651eaa88be501db88f4a5ffc584";
       sha256 = "13f740ly3c19gcmhjngiycvmc3mcfj61y00i6jv0wmfgpm2z3ank";
+
+    # ntl upgrade
+    (fetchpatch {
+      name = "lcalc-c++11.patch";
+      url = "https://git.archlinux.org/svntogit/community.git/plain/trunk/sagemath-lcalc-c++11.patch?h=packages/sagemath&id=0e31ae526ab7c6b5c0bfacb3f8b1c4fd490035aa";
+      sha256 = "0p5wnvbx65i7cp0bjyaqgp4rly8xgnk12pqwaq3dqby0j2bk6ijb";
     })
   ];
 
diff --git a/pkgs/development/libraries/science/math/lcalc/default.nix b/pkgs/development/libraries/science/math/lcalc/default.nix
index 6bbd43b0c84..e55244b2a59 100644
--- a/pkgs/development/libraries/science/math/lcalc/default.nix
+++ b/pkgs/development/libraries/science/math/lcalc/default.nix
@@ -57,6 +57,18 @@ stdenv.mkDerivation rec {
 
     # based on gentoos makefile patch -- fix paths, adhere to flags
     ./makefile.patch
+
+    # (fetchpatch {
+    #   name = "default-double.patch";
+    #   url = "https://github.com/dimpase/lcalc/pull/1/commits/0500c67b6aa1f492715591669f6647c8f7a3ea59.patch";
+    #   sha256 = "0dqwmxpm9wb53qbypsyfkgsvk2f8nf67sydphd4dkc2vw4yz6vla";
+    # })
+
+    (fetchpatch {
+      name = "c++11.patch";
+      url = "https://git.archlinux.org/svntogit/community.git/plain/trunk/lcalc-c++11.patch?h=packages/lcalc&id=3607b97df5a8c231191115b0cb5c62426b339e71";
+      sha256 = "1ccrl61lv2vvx8ggldq54m5d0n1iy6mym7qz0i8nj6yj0dshnpk3";
+    })
   ];
 
   installFlags = [