diff --git a/pkgs/by-name/ea/easyeffects/package.nix b/pkgs/by-name/ea/easyeffects/package.nix
index b7cd43625e69..4820e3eb13ee 100644
--- a/pkgs/by-name/ea/easyeffects/package.nix
+++ b/pkgs/by-name/ea/easyeffects/package.nix
@@ -68,8 +68,6 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-Tz14pjI5pNJOQH0KFaf9mJkFdup1GVxlkMnzVQusx/M=";
   };
 
-  patches = [ ./qmlmodule-fix.patch ];
-
   nativeBuildInputs = [
     cmake
     extra-cmake-modules
diff --git a/pkgs/by-name/ea/easyeffects/qmlmodule-fix.patch b/pkgs/by-name/ea/easyeffects/qmlmodule-fix.patch
deleted file mode 100644
index 5ef0be2365fa..000000000000
--- a/pkgs/by-name/ea/easyeffects/qmlmodule-fix.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 2736ac18b..85be09a90 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -65,7 +65,7 @@ find_package(KF${QT_MAJOR_VERSION} REQUIRED COMPONENTS
-     QQC2DesktopStyle
- )
- 
--ecm_find_qmlmodule(org.kde.kirigami REQUIRED)
-+ecm_find_qmlmodule(org.kde.kirigami)
- 
- qt_policy(SET QTP0001 NEW)
diff --git a/pkgs/by-name/ko/kontainer/package.nix b/pkgs/by-name/ko/kontainer/package.nix
index d6cabdaf68f9..4ee9ae7f474c 100644
--- a/pkgs/by-name/ko/kontainer/package.nix
+++ b/pkgs/by-name/ko/kontainer/package.nix
@@ -22,11 +22,6 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-15H4fTZ4Tja+nt0iKtFuULj/4g/0UK+W79R4kH7BFcs=";
   };
 
-  postPatch = ''
-    substituteInPlace CMakeLists.txt \
-      --replace-fail "ecm_find_qmlmodule(org.kde.kirigami REQUIRED)" "ecm_find_qmlmodule(org.kde.kirigami)"
-  '';
-
   nativeBuildInputs = [
     cmake
     ninja
diff --git a/pkgs/kde/gear/itinerary/default.nix b/pkgs/kde/gear/itinerary/default.nix
index 0b2292a2ada3..2451fc34ce93 100644
--- a/pkgs/kde/gear/itinerary/default.nix
+++ b/pkgs/kde/gear/itinerary/default.nix
@@ -9,9 +9,6 @@
 mkKdeDerivation {
   pname = "itinerary";
 
-  # FIXME: this should really be fixed at ECM level somehow
-  patches = [ ./optional-runtime-dependencies.patch ];
-
   extraNativeBuildInputs = [
     pkg-config
     shared-mime-info
diff --git a/pkgs/kde/gear/itinerary/optional-runtime-dependencies.patch b/pkgs/kde/gear/itinerary/optional-runtime-dependencies.patch
deleted file mode 100644
index c82a3bf1ffe3..000000000000
--- a/pkgs/kde/gear/itinerary/optional-runtime-dependencies.patch
+++ /dev/null
@@ -1,13 +0,0 @@
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -80,8 +80,8 @@ ecm_find_qmlmodule(QtPositioning 6.0)
- ecm_find_qmlmodule(org.kde.kitemmodels ${KF_MIN_VERSION})
- ecm_find_qmlmodule(org.kde.prison ${KF_MIN_VERSION})
- ecm_find_qmlmodule(org.kde.prison.scanner ${KF_MIN_VERSION})
--ecm_find_qmlmodule(org.kde.kosmindoormap ${GEAR_MIN_VERSION} REQUIRED)
--ecm_find_qmlmodule(org.kde.kopeninghours ${GEAR_MIN_VERSION} REQUIRED)
-+ecm_find_qmlmodule(org.kde.kosmindoormap ${GEAR_MIN_VERSION})
-+ecm_find_qmlmodule(org.kde.kopeninghours ${GEAR_MIN_VERSION})
- 
- # runtime dependencies are build-time dependencies on Android
- if (ANDROID)
diff --git a/pkgs/kde/gear/keysmith/default.nix b/pkgs/kde/gear/keysmith/default.nix
index d73c66fdd6f3..e01b7a61e266 100644
--- a/pkgs/kde/gear/keysmith/default.nix
+++ b/pkgs/kde/gear/keysmith/default.nix
@@ -7,10 +7,6 @@
 mkKdeDerivation {
   pname = "keysmith";
 
-  patches = [
-    ./optional-runtime-dependencies.patch
-  ];
-
   extraNativeBuildInputs = [ pkg-config ];
   extraBuildInputs = [
     qtsvg
diff --git a/pkgs/kde/gear/keysmith/optional-runtime-dependencies.patch b/pkgs/kde/gear/keysmith/optional-runtime-dependencies.patch
deleted file mode 100644
index 45f16de0b02c..000000000000
--- a/pkgs/kde/gear/keysmith/optional-runtime-dependencies.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 55ce9e0..86af3e0 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -47,7 +47,7 @@ find_package(KF6CoreAddons ${KF_MIN_VERSION} REQUIRED)
- find_package(KF6I18n ${KF_MIN_VERSION} REQUIRED)
- find_package(KF6Config ${KF_MIN_VERSION} REQUIRED)
- 
--ecm_find_qmlmodule(org.kde.prison.scanner REQUIRED)
-+ecm_find_qmlmodule(org.kde.prison.scanner)
- 
- ecm_set_disabled_deprecation_versions(QT 6.0.0
-     KF 6.12.0
diff --git a/pkgs/kde/gear/koko/default.nix b/pkgs/kde/gear/koko/default.nix
index 613f2981fe52..37fccb93ece2 100644
--- a/pkgs/kde/gear/koko/default.nix
+++ b/pkgs/kde/gear/koko/default.nix
@@ -33,10 +33,6 @@ mkKdeDerivation {
     ln -s ${cities1000} src/cities1000.zip
   '';
 
-  patches = [
-    ./optional-runtime-dependencies.patch
-  ];
-
   extraNativeBuildInputs = [ pkg-config ];
   extraBuildInputs = [
     qtmultimedia
diff --git a/pkgs/kde/gear/koko/optional-runtime-dependencies.patch b/pkgs/kde/gear/koko/optional-runtime-dependencies.patch
deleted file mode 100644
index 9bd628145acf..000000000000
--- a/pkgs/kde/gear/koko/optional-runtime-dependencies.patch
+++ /dev/null
@@ -1,13 +0,0 @@
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -76,8 +76,8 @@ set_package_properties(KF6Kirigami PROPERTIES
-     TYPE RUNTIME
- )
- 
--ecm_find_qmlmodule(org.kde.kirigamiaddons.formcard REQUIRED)
--ecm_find_qmlmodule(org.kde.kirigamiaddons.delegates REQUIRED)
-+ecm_find_qmlmodule(org.kde.kirigamiaddons.formcard)
-+ecm_find_qmlmodule(org.kde.kirigamiaddons.delegates)
- 
- find_package(KF6KirigamiAddons)
- set_package_properties(KF6KirigamiAddons PROPERTIES
diff --git a/pkgs/kde/plasma/discover/default.nix b/pkgs/kde/plasma/discover/default.nix
index 6bac06517954..89d3df681814 100644
--- a/pkgs/kde/plasma/discover/default.nix
+++ b/pkgs/kde/plasma/discover/default.nix
@@ -9,12 +9,6 @@
 mkKdeDerivation {
   pname = "discover";
 
-  patches = [
-    # remove forced QML dependency check
-    # FIXME: fix the check in ECM instead
-    ./qml-deps.patch
-  ];
-
   extraNativeBuildInputs = [ pkg-config ];
   extraBuildInputs = [
     qtwebview
diff --git a/pkgs/kde/plasma/discover/qml-deps.patch b/pkgs/kde/plasma/discover/qml-deps.patch
deleted file mode 100644
index 3b5527a2cb61..000000000000
--- a/pkgs/kde/plasma/discover/qml-deps.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 04523c97d..945ba6a41 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -59,7 +59,7 @@ find_package(QCoro6 REQUIRED COMPONENTS Core)
- 
- qcoro_enable_coroutines()
- 
--ecm_find_qmlmodule(org.kde.kitemmodels 1.0 REQUIRED)
-+ecm_find_qmlmodule(org.kde.kitemmodels 1.0)
- 
- list(APPEND CMAKE_AUTOMOC_MACRO_NAMES "DISCOVER_BACKEND_PLUGIN")
- 
diff --git a/pkgs/kde/plasma/plasma-setup/default.nix b/pkgs/kde/plasma/plasma-setup/default.nix
index 0fcf89369f2d..61efd2268e13 100644
--- a/pkgs/kde/plasma/plasma-setup/default.nix
+++ b/pkgs/kde/plasma/plasma-setup/default.nix
@@ -7,8 +7,6 @@
 mkKdeDerivation {
   pname = "plasma-setup";
 
-  patches = [ ./optional-dependencies.patch ];
-
   extraNativeBuildInputs = [ pkg-config ];
   extraBuildInputs = [
     qtlocation
diff --git a/pkgs/kde/plasma/plasma-setup/optional-dependencies.patch b/pkgs/kde/plasma/plasma-setup/optional-dependencies.patch
deleted file mode 100644
index 923072ceae8c..000000000000
--- a/pkgs/kde/plasma/plasma-setup/optional-dependencies.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/modules/keyboard/CMakeLists.txt b/modules/keyboard/CMakeLists.txt
-index ddd52df8bc1cc1c6c3bc6b90d9b7f913092995a2..4a108baf60dcf0a87ad9e512f63884dba4442c10 100644
---- a/modules/keyboard/CMakeLists.txt
-+++ b/modules/keyboard/CMakeLists.txt
-@@ -9,7 +9,7 @@ ecm_qt_declare_logging_category(logging_SRCS
-     EXPORT PLASMASETUP
- )
- 
--ecm_find_qmlmodule(org.kde.plasma.private.kcm_keyboard REQUIRED)
-+ecm_find_qmlmodule(org.kde.plasma.private.kcm_keyboard)
- 
- ecm_add_qml_module(plasmasetup_keyboard
-     URI "org.kde.plasmasetup.keyboard"