1 files changed, 3 insertions, 1 deletions
diff --git a/pkgs/applications/science/logic/coq/default.nix b/pkgs/applications/science/logic/coq/default.nix
index a463a2c5f3a2..2378cb9408ef 100644
--- a/pkgs/applications/science/logic/coq/default.nix
+++ b/pkgs/applications/science/logic/coq/default.nix
@@ -31,6 +31,8 @@ let
    "8.9.1" = "1xrq6mkhpq994bncmnijf8jwmwn961kkpl4mwwlv7j3dgnysrcv2";
    "8.10.0" = "138jw94wp4mg5dgjc2asn8ng09ayz1mxdznq342n0m469j803gzg";
    "8.10.1" = "072v2zkjzf7gj48137wpr3c9j0hg9pdhlr5l8jrgrwynld8fp7i4";
+   "8.10.2" = "0znxmpy71bfw0p6x47i82jf5k7v41zbz9bdpn901ysn3ir8l3wrz";
+   "8.11+beta1" = "06dlxj6v7gd51dh6ir121z7lgqdagkq717xxxrc8bdqhz7d2z7qj";
   }.${version};
   coq-version = stdenv.lib.versions.majorMinor version;
   versionAtLeast = stdenv.lib.versionAtLeast coq-version;
@@ -124,7 +126,7 @@ self = stdenv.mkDerivation {
   setupHook = writeText "setupHook.sh" ''
     addCoqPath () {
       if test -d "''$1/lib/coq/${coq-version}/user-contrib"; then
-        export COQPATH="''${COQPATH}''${COQPATH:+:}''$1/lib/coq/${coq-version}/user-contrib/"
+        export COQPATH="''${COQPATH-}''${COQPATH:+:}''$1/lib/coq/${coq-version}/user-contrib/"
       fi
     }