diff --git a/pkgs/applications/science/logic/coq/8.6.nix b/pkgs/applications/science/logic/coq/8.6.nix
deleted file mode 100644
index 9d3aa756aa58..000000000000
--- a/pkgs/applications/science/logic/coq/8.6.nix
+++ /dev/null
@@ -1,88 +0,0 @@
-# - coqide compilation can be disabled by setting lablgtk to null;
-# - The csdp program used for the Micromega tactic is statically referenced.
-#   However, coq can build without csdp by setting it to null.
-#   In this case some Micromega tactics will search the user's path for the csdp program and will fail if it is not found.
-# - The patch-level version can be specified through the `pl` argument to
-#   the derivation; it defaults to the greatest.
-
-{ stdenv, fetchurl, writeText, pkgconfig
-, ocaml, findlib, camlp5, ncurses
-, lablgtk ? null, csdp ? null
-, pl ? "1"
-}:
-
-let
-  # version = "8.6pl${pl}";
-  version = "8.6";
-  sha256 = "1pw1xvy1657l1k69wrb911iqqflzhhp8wwsjvihbgc72r3skqg3f";
-  coq-version = "8.6";
-  buildIde = lablgtk != null;
-  ideFlags = if buildIde then "-lablgtkdir ${lablgtk}/lib/ocaml/*/site-lib/lablgtk2 -coqide opt" else "";
-  csdpPatch = if csdp != null then ''
-    substituteInPlace plugins/micromega/sos.ml --replace "; csdp" "; ${csdp}/bin/csdp"
-    substituteInPlace plugins/micromega/coq_micromega.ml --replace "System.is_in_system_path \"csdp\"" "true"
-  '' else "";
-in
-
-stdenv.mkDerivation {
-  name = "coq-${version}";
-
-  inherit coq-version;
-  inherit ocaml camlp5;
-
-  src = fetchurl {
-    url = "http://coq.inria.fr/distrib/V${version}/files/coq-${version}.tar.gz";
-    inherit sha256;
-  };
-
-  buildInputs = [ pkgconfig ocaml findlib camlp5 ncurses lablgtk ];
-
-  postPatch = ''
-    UNAME=$(type -tp uname)
-    RM=$(type -tp rm)
-    substituteInPlace configure --replace "/bin/uname" "$UNAME"
-    substituteInPlace tools/beautify-archive --replace "/bin/rm" "$RM"
-    substituteInPlace configure.ml --replace '"md5 -q"' '"md5sum"'
-    ${csdpPatch}
-  '';
-
-  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/"
-      fi
-    }
-
-    envHooks=(''${envHooks[@]} addCoqPath)
-  '';
-
-  preConfigure = ''
-    configureFlagsArray=(
-      -opt
-      ${ideFlags}
-    )
-  '';
-
-  prefixKey = "-prefix ";
-
-  buildFlags = "revision coq coqide bin/votour";
-
-  postInstall = ''
-    cp bin/votour $out/bin/
-  '';
-
-  meta = with stdenv.lib; {
-    description = "Coq proof assistant";
-    longDescription = ''
-      Coq is a formal proof management system.  It provides a formal language
-      to write mathematical definitions, executable algorithms and theorems
-      together with an environment for semi-interactive development of
-      machine-checked proofs.
-    '';
-    homepage = "http://coq.inria.fr";
-    license = licenses.lgpl21;
-    branch = coq-version;
-    maintainers = with maintainers; [ roconnor thoughtpolice vbgl ];
-    platforms = platforms.unix;
-  };
-}
diff --git a/pkgs/applications/science/logic/coq/8.5.nix b/pkgs/applications/science/logic/coq/default.nix
similarity index 69%
rename from pkgs/applications/science/logic/coq/8.5.nix
rename to pkgs/applications/science/logic/coq/default.nix
index aae2101f50e9..bc9ba049cd2c 100644
--- a/pkgs/applications/science/logic/coq/8.5.nix
+++ b/pkgs/applications/science/logic/coq/default.nix
@@ -1,26 +1,27 @@
-# - coqide compilation can be disabled by setting lablgtk to null;
+# - coqide compilation can be disabled by setting buildIde to false
 # - The csdp program used for the Micromega tactic is statically referenced.
 #   However, coq can build without csdp by setting it to null.
 #   In this case some Micromega tactics will search the user's path for the csdp program and will fail if it is not found.
-# - The patch-level version can be specified through the `pl` argument to
+# - The patch-level version can be specified through the `version` argument to
 #   the derivation; it defaults to the greatest.
 
 { stdenv, fetchurl, writeText, pkgconfig
-, ocaml, findlib, camlp5, ncurses
-, lablgtk ? null, csdp ? null
-, pl ? "3"
+, ocamlPackages, ncurses
+, buildIde ? true
+, csdp ? null
+, version ? "8.6"
 }:
 
 let
-  version = "8.5pl${pl}";
   sha256 = {
-   "1" = "1w2xvm6w16khfn63bp95s25hnkn2ny3w0yqg3lq63gp11aqpbyjb";
-   "2" = "0wyywia0darak2zmc5v0ra9rn0b9whwdfiahralm8v5za499s8w3";
-   "3" = "0fyk2a4fpifibq8y8jhx1891k55qnsnlygglch64sva0bph94nrh";
-  }."${pl}";
-  coq-version = "8.5";
-  buildIde = lablgtk != null;
-  ideFlags = if buildIde then "-lablgtkdir ${lablgtk}/lib/ocaml/*/site-lib/lablgtk2 -coqide opt" else "";
+   "8.5pl1"	= "1w2xvm6w16khfn63bp95s25hnkn2ny3w0yqg3lq63gp11aqpbyjb";
+   "8.5pl2"	= "0wyywia0darak2zmc5v0ra9rn0b9whwdfiahralm8v5za499s8w3";
+   "8.5pl3"	= "0fyk2a4fpifibq8y8jhx1891k55qnsnlygglch64sva0bph94nrh";
+   "8.6"	= "1pw1xvy1657l1k69wrb911iqqflzhhp8wwsjvihbgc72r3skqg3f";
+  }."${version}";
+  coq-version = builtins.substring 0 3 version;
+  camlp5 = ocamlPackages.camlp5_transitional;
+  ideFlags = if buildIde then "-lablgtkdir ${ocamlPackages.lablgtk}/lib/ocaml/*/site-lib/lablgtk2 -coqide opt" else "";
   csdpPatch = if csdp != null then ''
     substituteInPlace plugins/micromega/sos.ml --replace "; csdp" "; ${csdp}/bin/csdp"
     substituteInPlace plugins/micromega/coq_micromega.ml --replace "System.is_in_system_path \"csdp\"" "true"
@@ -31,14 +32,18 @@ stdenv.mkDerivation {
   name = "coq-${version}";
 
   inherit coq-version;
-  inherit ocaml camlp5;
+  inherit camlp5;
+  inherit (ocamlPackages) ocaml;
+  passthru = {
+    inherit (ocamlPackages) findlib;
+  };
 
   src = fetchurl {
     url = "http://coq.inria.fr/distrib/V${version}/files/coq-${version}.tar.gz";
     inherit sha256;
   };
 
-  buildInputs = [ pkgconfig ocaml findlib camlp5 ncurses lablgtk ];
+  buildInputs = [ pkgconfig ocamlPackages.ocaml ocamlPackages.findlib camlp5 ncurses ocamlPackages.lablgtk ];
 
   postPatch = ''
     UNAME=$(type -tp uname)
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b617e876e81d..f6c300a5b2b8 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16979,14 +16979,10 @@ with pkgs;
     inherit (ocamlPackages_4_01_0) ocaml findlib lablgtk;
     camlp5 = ocamlPackages_4_01_0.camlp5_transitional;
   };
-  coq_8_5 = callPackage ../applications/science/logic/coq/8.5.nix {
-    inherit (ocamlPackages) ocaml findlib lablgtk;
-    camlp5 = ocamlPackages.camlp5_transitional;
-  };
-  coq_8_6 = callPackage ../applications/science/logic/coq/8.6.nix {
-    inherit (ocamlPackages) ocaml findlib lablgtk;
-    camlp5 = ocamlPackages.camlp5_transitional;
+  coq_8_5 = callPackage ../applications/science/logic/coq {
+    version = "8.5pl3";
   };
+  coq_8_6 = callPackage ../applications/science/logic/coq {};
   coq_HEAD = callPackage ../applications/science/logic/coq/HEAD.nix {
     inherit (ocamlPackages) ocaml findlib lablgtk;
     camlp5 = ocamlPackages.camlp5_transitional;