diff --git a/pkgs/applications/editors/emacs/elisp-packages/apheleia/default.nix b/pkgs/applications/editors/emacs/elisp-packages/apheleia/default.nix
index 935533b34ae9..c0fb5680461a 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/apheleia/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/apheleia/default.nix
@@ -7,7 +7,7 @@
 
 trivialBuild rec {
   pname = "apheleia";
-  version = "0.0.0+unstable=2021-08-08";
+  version = "0.pre+unstable=2021-08-08";
 
   src = fetchFromGitHub {
     owner = "raxod502";
diff --git a/pkgs/applications/editors/emacs/elisp-packages/bqn-mode/default.nix b/pkgs/applications/editors/emacs/elisp-packages/bqn-mode/default.nix
index ee2a18cd9123..876392c0810a 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/bqn-mode/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/bqn-mode/default.nix
@@ -5,7 +5,7 @@
 
 trivialBuild {
   pname = "bqn-mode";
-  version = "0.0.0+unstable=2021-09-27";
+  version = "0.pre+unstable=2021-09-27";
 
   src = fetchFromGitHub {
     owner = "AndersonTorres";
diff --git a/pkgs/applications/editors/emacs/elisp-packages/color-theme-solarized/default.nix b/pkgs/applications/editors/emacs/elisp-packages/color-theme-solarized/default.nix
index feb6c0fa86ca..1ac8b2f70768 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/color-theme-solarized/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/color-theme-solarized/default.nix
@@ -7,7 +7,7 @@
 
 trivialBuild {
   pname = "color-theme-solarized";
-  version = "0.0.0+unstable=2017-10-24";
+  version = "0.pre+unstable=2017-10-24";
 
   src = fetchFromGitHub {
     owner = "sellout";
diff --git a/pkgs/applications/editors/emacs/elisp-packages/evil-markdown/default.nix b/pkgs/applications/editors/emacs/elisp-packages/evil-markdown/default.nix
index 58c542a57f4f..a2605f33778d 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/evil-markdown/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/evil-markdown/default.nix
@@ -6,7 +6,7 @@
 
 trivialBuild rec {
   pname = "evil-markdown";
-  version = "0.0.0+unstable=2021-07-21";
+  version = "0.pre+unstable=2021-07-21";
 
   src = fetchFromGitHub {
     owner = "Somelauw";
diff --git a/pkgs/applications/editors/emacs/elisp-packages/git-undo/default.nix b/pkgs/applications/editors/emacs/elisp-packages/git-undo/default.nix
index 8b353409c372..503554412b5b 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/git-undo/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/git-undo/default.nix
@@ -7,7 +7,7 @@
 
 trivialBuild {
   pname = "git-undo";
-  version = "0.0.0+unstable=2019-12-21";
+  version = "0.pre+unstable=2019-12-21";
 
   src = fetchFromGitHub {
     owner = "jwiegley";
diff --git a/pkgs/applications/editors/emacs/elisp-packages/helm-words/default.nix b/pkgs/applications/editors/emacs/elisp-packages/helm-words/default.nix
index 1cc7a23e17d1..21a65614398a 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/helm-words/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/helm-words/default.nix
@@ -8,7 +8,7 @@
 
 trivialBuild rec {
   pname = "helm-words";
-  version = "0.0.0+unstable=2019-03-12";
+  version = "0.pre+unstable=2019-03-12";
 
   src = fetchFromGitHub {
     owner = "emacsmirror";
diff --git a/pkgs/applications/editors/emacs/elisp-packages/isearch-prop/default.nix b/pkgs/applications/editors/emacs/elisp-packages/isearch-prop/default.nix
index 067d6f4481f2..6251fd6932a7 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/isearch-prop/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/isearch-prop/default.nix
@@ -7,7 +7,7 @@
 
 trivialBuild {
   pname = "isearch-prop";
-  version = "0.0.0+unstable=2019-05-01";
+  version = "0.pre+unstable=2019-05-01";
 
   src = fetchFromGitHub {
     owner = "emacsmirror";
diff --git a/pkgs/applications/editors/emacs/elisp-packages/nano-theme/default.nix b/pkgs/applications/editors/emacs/elisp-packages/nano-theme/default.nix
index 3bdf1a75f430..1dcf27e64ebc 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/nano-theme/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/nano-theme/default.nix
@@ -6,7 +6,7 @@
 
 trivialBuild rec {
   pname = "nano-theme";
-  version = "0.0.0+unstable=2021-06-29";
+  version = "0.pre+unstable=2021-06-29";
 
   src = fetchFromGitHub {
     owner = "rougier";
diff --git a/pkgs/applications/editors/emacs/elisp-packages/power-mode/default.nix b/pkgs/applications/editors/emacs/elisp-packages/power-mode/default.nix
index 75015a959c2b..d02283f25ad8 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/power-mode/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/power-mode/default.nix
@@ -6,7 +6,7 @@
 
 trivialBuild rec {
   pname = "power-mode";
-  version = "0.0.0+unstable=2021-06-06";
+  version = "0.pre+unstable=2021-06-06";
 
   src = fetchFromGitHub {
     owner = "elizagamedev";
diff --git a/pkgs/applications/editors/emacs/elisp-packages/railgun/default.nix b/pkgs/applications/editors/emacs/elisp-packages/railgun/default.nix
index e49925e057ce..87a20caf9f07 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/railgun/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/railgun/default.nix
@@ -6,7 +6,7 @@
 
 trivialBuild {
   pname = "railgun";
-  version= "0.0.0+unstable=2012-10-17";
+  version= "0.pre+unstable=2012-10-17";
 
   src = fetchFromGitHub {
     owner = "mbriggs";
diff --git a/pkgs/applications/editors/emacs/elisp-packages/sunrise-commander/default.nix b/pkgs/applications/editors/emacs/elisp-packages/sunrise-commander/default.nix
index 09889593fe69..1e1fffe9adbc 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/sunrise-commander/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/sunrise-commander/default.nix
@@ -6,7 +6,7 @@
 
 trivialBuild rec {
   pname = "sunrise-commander";
-  version = "0.0.0+unstable=2021-07-22";
+  version = "0.pre+unstable=2021-07-22";
 
   src = fetchFromGitHub {
     owner = pname;
diff --git a/pkgs/applications/editors/emacs/elisp-packages/youtube-dl/default.nix b/pkgs/applications/editors/emacs/elisp-packages/youtube-dl/default.nix
index b0df381b5f95..7b57d69d5595 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/youtube-dl/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/youtube-dl/default.nix
@@ -7,7 +7,7 @@
 
 trivialBuild {
   pname = "youtube-dl";
-  version = "0.0.0+unstable=2018-10-12";
+  version = "0.pre+unstable=2018-10-12";
 
   src = fetchFromGitHub {
     owner = "skeeto";
diff --git a/pkgs/applications/graphics/inkscape/extensions/applytransforms/default.nix b/pkgs/applications/graphics/inkscape/extensions/applytransforms/default.nix
index 131daffffb9d..f1bac3dd76c4 100644
--- a/pkgs/applications/graphics/inkscape/extensions/applytransforms/default.nix
+++ b/pkgs/applications/graphics/inkscape/extensions/applytransforms/default.nix
@@ -6,7 +6,7 @@
 
 stdenv.mkDerivation {
   pname = "inkscape-applytransforms";
-  version = "0.0.0+unstable=2021-05-11";
+  version = "0.pre+unstable=2021-05-11";
 
   src = fetchFromGitHub {
     owner = "Klowner";
diff --git a/pkgs/applications/terminal-emulators/st/lukesmithxyz-st/default.nix b/pkgs/applications/terminal-emulators/st/lukesmithxyz-st/default.nix
index f285d0fc73b9..2f1476697ea9 100644
--- a/pkgs/applications/terminal-emulators/st/lukesmithxyz-st/default.nix
+++ b/pkgs/applications/terminal-emulators/st/lukesmithxyz-st/default.nix
@@ -12,7 +12,7 @@
 
 stdenv.mkDerivation rec {
   pname = "lukesmithxyz-st";
-  version = "0.0.0+unstable=2021-08-10";
+  version = "0.pre+unstable=2021-08-10";
 
   src = fetchFromGitHub {
     owner = "LukeSmithxyz";
diff --git a/pkgs/applications/terminal-emulators/st/mcaimi-st.nix b/pkgs/applications/terminal-emulators/st/mcaimi-st.nix
index 847638f304f3..11c89cfab670 100644
--- a/pkgs/applications/terminal-emulators/st/mcaimi-st.nix
+++ b/pkgs/applications/terminal-emulators/st/mcaimi-st.nix
@@ -11,7 +11,7 @@
 
 stdenv.mkDerivation rec {
   pname = "mcaimi-st";
-  version = "0.0.0+unstable=2021-08-30";
+  version = "0.pre+unstable=2021-08-30";
 
   src = fetchFromGitHub {
     owner = "mcaimi";
diff --git a/pkgs/applications/terminal-emulators/st/siduck76-st.nix b/pkgs/applications/terminal-emulators/st/siduck76-st.nix
index 55fcebff0e3d..a6753a105c6d 100644
--- a/pkgs/applications/terminal-emulators/st/siduck76-st.nix
+++ b/pkgs/applications/terminal-emulators/st/siduck76-st.nix
@@ -12,7 +12,7 @@
 
 stdenv.mkDerivation rec {
   pname = "siduck76-st";
-  version = "0.0.0+unstable=2021-08-20";
+  version = "0.pre+unstable=2021-08-20";
 
   src = fetchFromGitHub {
     owner = "siduck76";
diff --git a/pkgs/applications/window-managers/cardboard/default.nix b/pkgs/applications/window-managers/cardboard/default.nix
index 17ef08af5e82..5347b0961a54 100644
--- a/pkgs/applications/window-managers/cardboard/default.nix
+++ b/pkgs/applications/window-managers/cardboard/default.nix
@@ -57,7 +57,7 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "cardboard";
-  version = "0.0.0+unstable=2021-05-10";
+  version = "0.pre+unstable=2021-05-10";
 
   src = fetchFromGitLab {
     owner = "cardboardwm";
diff --git a/pkgs/applications/window-managers/wio/default.nix b/pkgs/applications/window-managers/wio/default.nix
index 03ec26f6fb8b..b5831d757756 100644
--- a/pkgs/applications/window-managers/wio/default.nix
+++ b/pkgs/applications/window-managers/wio/default.nix
@@ -19,7 +19,7 @@
 
 stdenv.mkDerivation rec {
   pname = "wio";
-  version = "0.0.0+unstable=2021-06-27";
+  version = "0.pre+unstable=2021-06-27";
 
   src = fetchFromBitbucket {
     owner = "anderson_torres";
diff --git a/pkgs/desktops/arcan/pipeworld.nix b/pkgs/desktops/arcan/pipeworld.nix
index 78af4ee049ee..359c3a21a67c 100644
--- a/pkgs/desktops/arcan/pipeworld.nix
+++ b/pkgs/desktops/arcan/pipeworld.nix
@@ -5,7 +5,7 @@
 
 stdenv.mkDerivation rec {
   pname = "pipeworld";
-  version = "0.0.0+unstable=2021-08-01";
+  version = "0.pre+unstable=2021-08-01";
 
   src = fetchFromGitHub {
     owner = "letoram";
diff --git a/pkgs/desktops/arcan/prio.nix b/pkgs/desktops/arcan/prio.nix
index 764d82fae9b7..34443baa8017 100644
--- a/pkgs/desktops/arcan/prio.nix
+++ b/pkgs/desktops/arcan/prio.nix
@@ -5,7 +5,7 @@
 
 stdenv.mkDerivation rec {
   pname = "prio";
-  version = "0.0.0+unstable=2018-09-13";
+  version = "0.pre+unstable=2018-09-13";
 
   src = fetchFromGitHub {
     owner = "letoram";
diff --git a/pkgs/misc/emulators/emu2/default.nix b/pkgs/misc/emulators/emu2/default.nix
index 65081153ab32..7949a3f2b051 100644
--- a/pkgs/misc/emulators/emu2/default.nix
+++ b/pkgs/misc/emulators/emu2/default.nix
@@ -5,7 +5,7 @@
 
 stdenv.mkDerivation rec {
   pname = "emu2";
-  version = "0.0.0+unstable=2021-09-22";
+  version = "0.pre+unstable=2021-09-22";
 
   src = fetchFromGitHub {
     owner = "dmsc";
diff --git a/pkgs/misc/emulators/uxn/default.nix b/pkgs/misc/emulators/uxn/default.nix
index 3e4928412b11..0b797e2e160b 100644
--- a/pkgs/misc/emulators/uxn/default.nix
+++ b/pkgs/misc/emulators/uxn/default.nix
@@ -6,7 +6,7 @@
 
 stdenv.mkDerivation rec {
   pname = "uxn";
-  version = "0.0.0+unstable=2021-08-30";
+  version = "0.pre+unstable=2021-08-30";
 
   src = fetchFromSourcehut {
     owner = "~rabbits";